Sources & data layers — districtry Mississippi

This app is a reader over other people's data. It draws no boundary of its own and names no officeholder it cannot cite, so the useful question about any answer it gives is who published this, and when. That is what this page is for: the publishers the app credits as a whole, then one row per layer naming the source behind that layer specifically.

Not for legal or official use. Boundary and roster data come from public sources that explicitly disclaim legal precision. Always confirm district assignments and officeholders with the relevant government office before relying on them for anything official.

Data last verified: October 15, 2026

Where a source publishes nothing, the app says so rather than guessing — the missing-data panel on the map is the standing list of what nobody publishes yet, and what would close each gap.

This page says where each answer comes from today.

Who publishes the data

The upstream publishers this app depends on, across all layers. Per-layer provenance is in the matrix below.

U.S. Census Bureau TIGERweb County, place, school-district, ZIP and legislative-district boundaries.
unitedstates/congress-legislators U.S. House roster (CC0).
Mississippi Legislature Mississippi Senate and Mississippi House members, their parties, Capitol e-mail addresses and own telephone numbers, and which seats are vacant.
Mississippi Secretary of State Every county's board of supervisors, by district (County Offices and Directory).
USGS The National Map Police, fire and EMS stations and post offices (public domain).

The layer matrix

17 layers — 10 political and legislative, 2 public safety, 1 schools, 4 geography and amenities. Each row names the publisher the boundary comes from, where the names on the card come from, and the ground the layer actually answers on — outside that ground the layer hides itself rather than guessing.

Political & legislative 10 layers

Districts that elect somebody — from your ward to your seat in Congress.

Layer	What it answers	Boundary source	Who it names	Where it applies
Supreme Court District`ms-supreme-court`	The Mississippi Supreme Court district covering the point, and the three justices elected from it.	State of Mississippi Judiciary — the Supreme Court's district page, which lists the counties in each of the three districts; read 2026-10-15 and kept in ms/data/source/courts/ with its SHA-256. Drawn by dissolving this app's own county outlines, so every line is a county line.	ms-judge-roster.json, rebuilt weekly by CI from the Supreme Court's own page of its justices: each justice's name, title and place, and a link to the justice's page on the court's site.	Mississippi — statewide, all 3 districts.
U.S. House`us-house`	The U.S. House district covering the point, and the representative holding it.	U.S. Census TIGERweb — Legislative, layer 0 (120th Congressional Districts), pre-built for the state and shipped with the app; 4 features for Mississippi, measured 2026-10-15. Mississippi did not redraw for 2026: the 120th-Congress map and the 119th's (layer 4) carry the same four districts with identical land areas. Simplified by Douglas-Peucker at a 5 m interval and refused over an 8 m fidelity ceiling.	congress-roster.json, rebuilt weekly by CI from the public-domain unitedstates/congress-legislators dataset — including each member's district office and Washington office.	Mississippi — statewide, all 4 districts.
Court of Appeals District`ms-court-of-appeals`	The Mississippi Court of Appeals district covering the point, and the two judges elected from it. In the ten counties two districts divide by voting precinct, the card names both districts, says which takes the listed precincts, and lists the judges of both.	State of Mississippi Judiciary — the Court of Appeals' district page, which lists the counties in each of the five districts and, for Attala, Grenada, Hinds, Jones, Leake, Madison, Montgomery, Panola, Tallahatchie and Wayne Counties, the precincts that belong to one of two districts; read 2026-10-15 and kept in ms/data/source/courts/. Drawn by dissolving this app's own county outlines; each of the ten divided counties is drawn on its own, because this app has no map of those precincts.	ms-judge-roster.json, rebuilt weekly by CI from the Court of Appeals' own page of its judges: each judge's name, title and position, and a link to the judge's page on the court's site.	Mississippi — statewide, all 5 districts.
Chancery Court District`ms-chancery-court`	The chancery court district covering the point and its chancellors, and, until 1 January 2027, what the redrawn map changes at the point.	State of Mississippi Judiciary — the chancery courts' page, which lists each district's counties; read 2026-10-15. Held district by district to the map Senate Bill 2768 (2025) writes for the time before 1 January 2027. Mississippi Legislature — Senate Bill 2768 (2025), as sent to the Governor, which writes each chancery district's counties until and from 1 January 2027, and House Bill 1 (2026), which rewrote the Third Chancery District's section with the same counties. Both kept in ms/data/source/courts/. The app draws the 2027 map from midnight on that day in Mississippi.	ms-judge-roster.json, rebuilt weekly by CI from the Judiciary's PDF list of chancellors: each chancellor's name and, since 2026-10-17, the chancellor's own telephone, where the list prints one for no other judge (a number several judges share is the court office's line). The list also prints court staff, some with street addresses, which are never carried. The list read 2026-10-15 is dated 1 August 2025, so the builder applies the changes since then that this project confirmed from the court's own news and the Governor's announcements — two appointments and two deaths — each with its source, and fails once the list catches up.	Mississippi — statewide, all 20 districts.
Circuit Court District`ms-circuit-court`	The circuit court district covering the point and its circuit judges, and, until 1 January 2027, what the redrawn map changes at the point.	State of Mississippi Judiciary — the circuit courts' page, which lists each district's counties; read 2026-10-15. Held district by district to the map House Bill 1544 (2025) writes for the time before 1 January 2027. Mississippi Legislature — House Bill 1544 (2025), as sent to the Governor, which writes each circuit district's counties until and from 1 January 2027 (the 23rd Circuit District ends on that day), and House Bill 580 (2026), which rewrote the Fourth and Seventh Circuit Districts' sections with the same counties. Both kept in ms/data/source/courts/. The app draws the 2027 map from midnight on that day in Mississippi.	ms-judge-roster.json, rebuilt weekly by CI from the Judiciary's PDF list of circuit judges: names and, as for the chancellors, each judge's own telephone. The list read 2026-10-15 is dated 4 February 2026; the one appointment since then that this project confirmed, from the Governor's announcement, is applied by the builder with its source.	Mississippi — statewide, all 23 districts (22 from 1 January 2027).
Mississippi Senate District`ms-senate`	The Mississippi Senate district covering the point, and the senator holding it.	U.S. Census TIGERweb — Legislative, layer 1 (state upper chamber), pre-built for the state and shipped with the app; 52 features, measured 2026-10-15. These are the lines of the 2025 court-ordered redraw, which moved nine Senate districts (1, 2, 11, 19, 34, 41, 42, 44 and 45) for the special elections of 4 November 2025. Simplified by Douglas-Peucker at a 5 m interval and refused over an 8 m fidelity ceiling.	ms-senate-members.json, rebuilt weekly by CI from the Mississippi Legislature's own member gallery and each member's own profile (name, party, Senate e-mail address, the Senate's Capitol office and, since 2026-10-19, the member's own home, business and cell telephones, each with the word the profile prints for it). The gallery shows a vacant seat as a card reading Vacant, and the card says so: Senate 34 on 2026-10-15. The profiles also print a home address, which the builder never reads, and sometimes a fax line, which never ships.	Mississippi — statewide, all 52 districts.
Mississippi House District`ms-house`	The Mississippi House district covering the point, and the representative holding it.	U.S. Census TIGERweb — Legislative, layer 2 (state lower chamber), pre-built for the state and shipped with the app; 122 features, measured 2026-10-15. These are the lines of the 2025 court-ordered redraw, which moved five House districts (16, 22, 36, 39 and 41). Simplified by Douglas-Peucker at a 5 m interval and refused over an 8 m fidelity ceiling.	ms-house-members.json, rebuilt weekly by CI from the Mississippi Legislature's own pages on the same terms as the Senate roster; House 70 and 77 read vacant on 2026-10-15.	Mississippi — statewide, all 122 districts.
County Supervisor District`county-supervisor`	The supervisor district covering the point, and the supervisor and the election commissioner elected from it, in the counties where this app has confirmed the current district lines. The layer is hidden in the other counties, where the County card still names all five of each.	U.S. Census TIGERweb — tigerWMS_Current, layer 22 (County Subdivisions, January 1, 2026 vintage), where the Census files each supervisor district as a nonfunctioning county subdivision; pre-built and shipped with the app for the 12 counties whose lines the Census changed after the 2020 census and whose five districts hold nearly equal numbers of people on that census's own blocks (3.2% to 9.0% apart, measured 2026-10-15): Choctaw, Clay, DeSoto, Grenada, Lawrence, Lowndes, Neshoba, Noxubee, Oktibbeha, Tate, Webster and Winston. In the other 70 counties the Census still carries older lines, which are never drawn: in 54 of them every resident is in the same district as on the Census's map of January 2010 (measured 2026-10-16). 13 of the 70 are drawn from other published maps instead (below). Central Mississippi Planning and Development District — the supervisor district layers of its county map viewers for Copiah, Hinds, Madison, Rankin, Simpson and Warren counties. Five are named for the plan adopted after the 2020 census (2021 in Rankin, 2022 in Copiah, Madison, Simpson and Warren), and all six give each district's population, which matches the 2020 census's own blocks to the person (in Rankin, after setting aside two blocks the plan leaves out). Redrawn here along whole 2020 census blocks: each block goes to the district that covers most of it, so every line drawn is the Census Bureau's. Covington County — the supervisor district layer of the parcel viewer the county's website links to, where it is called Supervisor Districts 2023, whose 2023 voting precincts each lie inside one of its districts for all but 17 of the county's 18,340 residents in the 2020 census, against 896 for the Census's lines (measured 2026-10-16). Redrawn along whole 2020 census blocks in the same way. Harrison County's own map server — its supervisor district layer, whose service says the lines were approved in 2023 as a result of the 2020 census. The Census's lines there put every resident in the same district as its map of January 2010. Redrawn along whole 2020 census blocks in the same way. Lamar County — the supervisor district layer of the parcel viewer the county's website links to, which matches the printed map of the districts the county publishes, dated 9 August 2022. Redrawn along whole 2020 census blocks in the same way. Lee County — the map published online as Lee Supervisor Districts 2022, which the Lee County Circuit Clerk's 2024 voting precinct map follows: that map names each precinct piece's supervisor district, and agrees with these lines for all but 10 of the county's 83,343 residents in the 2020 census, against 13,351 for the Census's lines (measured 2026-10-16). Redrawn along whole 2020 census blocks in the same way. Pearl River County — the supervisor district layer of the Find My Supervisor map on the county's website, which matches the printed map of the districts effective 1 January 2023 that the county publishes beside it, and the 2023 voting precinct map published with it. Redrawn along whole 2020 census blocks in the same way. Perry County — the supervisor district layer of the Find My Supervisor map on the county's website, whose 2023 voting precincts each lie inside one of its districts for all but 8 of the county's 11,511 residents in the 2020 census, against 444 for the Census's lines (measured 2026-10-16). Redrawn along whole 2020 census blocks in the same way. Tippah County — the map published online as the Tippah County 2022 Redistricting Map, which calls these lines the 2022 Supervisor Districts; who publishes it is not established. The 2024 voting precinct map published as the Tippah County Circuit Clerk Map names each precinct's supervisor district, and agrees with these lines for all of the county's 21,815 residents in the 2020 census and with the Census's lines for all but 669 (measured 2026-10-16). Redrawn along whole 2020 census blocks in the same way.	ms-county-officials.json, the roster the County card reads: the supervisor and the election commissioner elected from each district, from the Mississippi Secretary of State's County Offices and Directory (2026 edition, published 6 May 2026), joined by district number.	25 of Mississippi's 82 counties; hidden in the other 57, which the Data gaps panel lists and explains.
City Ward`city-ward`	The ward containing the point, in the nine Mississippi cities of 25,000 people or more whose current ward map this app has confirmed, and the member of the city council or board of aldermen elected from it.	City of Jackson — its ward layer Jackson Adopted Wards 2024, the one the city's Ward Maps page shows; its own population figures match the 2020 census's people inside its lines, ward by ward City of Gulfport — the wards layer of the city's own map server's 2025 service for wards, voting precincts and polling places (no adoption date was found; the seven wards are 8.1% apart on the 2020 census) DeSoto County — its map of its cities' wards, which records that Southaven adopted its wards on June 18, 2024 (and that Olive Branch adopted its own on June 7, 2022) City of Olive Branch — its ward layer Municipal_Wards_FINAL_2022, which the city's Find My Ward map links City of Tupelo — its ward layer, which the city's GIS maps page links as its ward map, described as the current aldermen wards (created July 2023; no adoption date was found) City of Oxford — its 2023 Wards layer, the Interactive Ward Map the city's Board of Aldermen page links, which matches the ward map the board approved on May 19, 2023 Central Mississippi Planning and Development District — the ward layers of Clinton (Wards 12-5-2023, the date of the city's Adopted Ward Plan), Pearl (Adopted Pearl Wards Effective 9-1-24) and Brandon (Wards (Adopted 1/18/2022)); each city's website links or embeds the planning district's map viewer that shows its wards U.S. Census TIGERweb — Places_CouSub_ConCity_SubMCD, layer 4 (incorporated places): each city's outer edge, where its wards are cut so the City Ward and City cards agree about which city a point is in	The member for each ward as the city's own website names them, and, where the city's page prints them inside that member's own entry, the member's telephone numbers (Olive Branch, Oxford and Brandon) and e-mail address (Gulfport, Olive Branch, Tupelo, Pearl and Brandon), from the same roster the City card reads (ms/data/app/ms-city-councils.json), dated on the card with the day the pages were read. No weekly job reads them again yet.	Jackson, Gulfport, Southaven, Olive Branch, Tupelo, Clinton, Pearl, Oxford and Brandon. The other six cities of 25,000 people or more (Biloxi, Hattiesburg, Meridian, Greenville, Madison and Horn Lake) are not drawn, each for a reason ms/scripts/build_ms_city_wards.py records, and the City card still names their mayor and council where the city's own website does.
Tribal Government`tribal-government`	Whether this address is on tribal land, and which nation's government answers for it — Mississippi has 2 such areas, both the Mississippi Band of Choctaw Indians'.	US Census Bureau TIGERweb AIANNHA, current vintage — federal reservations and off-reservation trust land, shipped with the app	The Mississippi Band of Choctaw Indians' Tribal Chief and its seventeen-member Tribal Council, each member with the community they represent, from the band's own page at choctaw.org, read weekly by scripts/tribal_council_scraper.py and dated on the card. The government, its seat and its website come from the Bureau of Indian Affairs' tribal leaders directory (data/bia-tribal-governments.json); the land is joined to the government by this project's own data/tribal-government-join.json.	Mississippi — the Mississippi Choctaw Reservation and its off-reservation trust land, most of the reservation in Neshoba County. Every other point in the state is on no tribal land the Census draws for a government.

Public safety 2 layers

Who answers a call at this address, and where they answer it from.

Layer	What it answers	Boundary source	Who it names	Where it applies
Police Station`police-station`	The three nearest police stations to the point, by straight-line distance, with each one's address.	USGS The National Map — structures layer 53 (Police Stations), queried live at runtime by a bounding envelope through the paged loader. Public domain. Measured 2026-10-15: 462 points in Mississippi's envelope, under the service's 2,000-record cap today, and paged anyway so that stops being a fact anyone has to re-check.	NO OFFICEHOLDER, AND NONE IS MISSING: a police station is a facility, not an elected district. Nobody is elected from one.	Mississippi — plus the border strip its envelope necessarily includes. A BUILDING, NOT A JURISDICTION: which agency answers at a given point is a service-area question this instance has not been researched for, so the card says where the nearest are and never who serves you. Nearest-three is a proximity fact, so for a reader near the state line the nearest one really may be in a neighbouring state, and the card's intro says these are straight-line distances.
Fire & EMS Station`fire-station`	The three nearest fire and EMS stations to the point, by straight-line distance, with each one's address.	USGS The National Map — structures layer 51 (Fire Stations/EMS Stations), queried live at runtime by a bounding envelope through the paged loader. Public domain. Measured 2026-10-15: 1,508 points in Mississippi's envelope, within 492 of the service's 2,000-record cap, which is why the paging is not optional.	NO OFFICEHOLDER, AND NONE IS MISSING: a fire and EMS station is a facility, not an elected district. Nobody is elected from one.	Mississippi — plus the border strip its envelope necessarily includes. A BUILDING, NOT A JURISDICTION: which agency answers at a given point is a service-area question this instance has not been researched for, so the card says where the nearest are and never who serves you. Nearest-three is a proximity fact, so for a reader near the state line the nearest one really may be in a neighbouring state, and the card's intro says these are straight-line distances.

Schools 1 layer

The district, the attendance zone, and the schools nearest the point.

Layer	What it answers	Boundary source	Who it names	Where it applies
School District`school-district-unified`	The public school district covering the point.	U.S. Census TIGERweb — School, layer 0 (unified school districts), copied into a tile archive served from this site, re-fetched from the Census weekly; 137 features for Mississippi, measured 2026-10-15.	NO OFFICEHOLDER, AND THE CARD NAMES THE DISTRICT ONLY. Mississippi's school boards are elected in most districts and appointed in some, and no statewide roster of their members has been read here. Recorded as gap ms-school-board-members.	Mississippi — statewide. The label carries no qualifier because there is nothing to distinguish it from: the elementary and secondary tilings TIGERweb serves for other states are EMPTY in Mississippi (0 features each, measured 2026-10-15), and the 137 unified districts' Census land area sums to exactly the 82-county total (121,535 km2).

Geography & amenities 4 layers

The boundaries that place an address without electing anyone, plus the nearest public services.

Layer	What it answers	Boundary source	Who it names	Where it applies
County`county`	Which county contains the point, the five supervisors on its board, and its five election commissioners.	U.S. Census TIGERweb — State_County, layer 1, pre-built for the state and shipped with the app; 82 features, measured 2026-10-15. Simplified by Douglas-Peucker at a 5 m interval and refused over an 8 m fidelity ceiling.	ms-county-officials.json, rebuilt weekly: the five members of each county's board of supervisors and its five election commissioners, by district, from the Mississippi Secretary of State's County Offices and Directory (2026 edition, published 6 May 2026). The board's address and telephone are carried only where at least three of the five supervisors print the same one, because five people do not share a home: 76 counties have a board address and 68 a board telephone on the 2026 edition. A telephone the directory prints for one supervisor or one election commissioner is carried on that person's own row, as printed, even where it may be the person's own line: 81 supervisors and 45 election commissioners have one on the 2026 edition. Their own addresses, which may be homes, are never carried.	Mississippi — statewide, all 82 counties.
ZIP Code`zip-code`	The ZIP Code Tabulation Area covering the point — the Census Bureau's areal approximation of the USPS delivery routes sharing a ZIP code, not a postal boundary.	U.S. Census TIGERweb — ZIP Code Tabulation Areas, layer 11 of the PUMA/TAD/TAZ/UGA/ZCTA service, copied into a tile archive served from this site, re-fetched from the Census weekly. ZCTAs carry NO STATE FIELD because they cross state lines, so this is the one TIGERweb layer here fetched by a bounding ENVELOPE rather than STATE='28'. 827 features in Mississippi's box, measured 2026-10-15.	NO OFFICEHOLDER, AND NONE IS MISSING: a ZIP code is a mail-routing convenience, not a unit of government, so nobody is elected from one. The card says what the boundary actually is rather than leaving a reader to assume it means more.	Mississippi. The layer is hidden outside the state outline, because outside it the Census's point query answers with a neighbouring state's real ZIP code (the Alabama test point gives 36925).
City, Town or Village`municipality`	The city, town or village containing the point, if any.	U.S. Census TIGERweb — Places_CouSub_ConCity_SubMCD, layer 4 (incorporated places), copied into a tile archive served from this site, re-fetched from the Census weekly; 300 features for Mississippi (113 cities, 167 towns and 20 villages, one of the towns recorded by the Census as inactive), measured 2026-10-15.	The mayor and the council or board of aldermen of each of the 15 cities of 25,000 people or more, seat by seat, as the city's own website names them (ms/scripts/build_ms_city_councils.py; data/app/ms-city-councils.json), dated on the card with the day the pages were read. Fourteen of the fifteen print every member; Greenville's website names no member, and its card says so. Five cities' pages (Olive Branch, Madison, Horn Lake, Oxford and Brandon) print telephone numbers inside a person's own entry, and the card carries each such number, labelled the way the page labels it; a number the pages print anywhere else, or for more than one person, is the office's and is not carried. Nine cities' pages (Olive Branch, Horn Lake, Gulfport, Tupelo, Madison, Pearl, Brandon, Hattiesburg and Meridian) print an e-mail address inside a person's own entry, and the card links each one on the same terms: an address the pages print anywhere else, or for more than one person, or that is named as an office's mailbox, is the office's and is not carried. The other cities, towns and villages name nobody here, because no statewide source naming Mississippi's mayors and aldermen has been read; recorded as gap ms-municipal-officeholders.	Mississippi — statewide. A point outside every city, town and village is unincorporated, which the card states.
Post Office`post-office`	The three nearest post offices to the point, by straight-line distance, with each one's address.	USGS The National Map — structures layer 38 (Post Offices), queried live at runtime by a bounding envelope through the paged loader. Public domain. Measured 2026-10-15: 654 points in Mississippi's envelope, under the service's 2,000-record cap today, and paged anyway so that stops being a fact anyone has to re-check.	NO OFFICEHOLDER, AND NONE IS MISSING: a post office is a facility, not an elected district. Nobody is elected from one.	Mississippi — plus the border strip its envelope necessarily includes. A BUILDING, NOT A JURISDICTION: which agency answers at a given point is a service-area question this instance has not been researched for, so the card says where the nearest are and never who serves you. Nearest-three is a proximity fact, so for a reader near the state line the nearest one really may be in a neighbouring state, and the card's intro says these are straight-line distances.