Tennessee sources & data layers

Every layer in districtry Tennessee, and exactly where its data comes from.

← Back to the map 🧩 What data is missing?

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 10, 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.

The layer matrix

19 layers — 7 political and legislative, 2 public safety, 4 schools, 6 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 7 layers

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
U.S. Houseus-house The U.S. House district covering the point, and the representative holding it. congress-roster.json, rebuilt weekly by CI from the public-domain unitedstates/congress-legislators dataset — including each member's district office and Washington office. Tennessee — statewide, all 9 districts.
Judicial Districttn-judicial-district The judicial district covering the point: the circuit and chancery courts there, whose judges the district's voters elect, and the district attorney general they also elect. No judge or district attorney is named yet, because no list of them by district has been read; recorded as gap tn-judicial-district-officers. The card says who elects them and for how long, and links the district attorney's own page. Tennessee — statewide, all 95 counties.
Tennessee Senate Districttn-senate The Tennessee Senate district covering the point, and the senator holding it. tn-senate-members.json, rebuilt weekly by CI. The NAME and whether the seat is vacant come from the Tennessee Legislature's own district map on the state's TNMap service; party, e-mail and the member's own page come from the Open States export, and only where its member for the district has the same surname. Neither source carries a capitol office or telephone, and the Legislature's own site refuses automated readers in its robots.txt, so it is linked from the card and never read. Tennessee — statewide, all 33 districts.
Tennessee House Districttn-house The Tennessee House district covering the point, and the representative holding it. tn-house-members.json, rebuilt weekly by CI on the same terms as the Senate roster. A seat the Legislature's map lists as vacant is shown as vacant, with the date it was first read so; House 31 and 84 on 2026-10-10. Tennessee — statewide, all 99 districts.
County Commission Districtcounty-commissioner The county commission district covering the point, and its county. In the three consolidated counties the district elects members of the consolidated government's governing body. Each county's own published list of its commission (in Nashville, the Metro Council), read every week, in the counties this app has reached so far; the county commission page lists them. Each county's list was checked against that county's own results of the 6 August 2026 election before its names were added. No state office publishes who sits on a county commission, so in every other county the card says the names are not on it yet; recorded as gap tn-county-commissioners. Tennessee — statewide, all 95 counties, 859 districts.
City Council Districtcity-ward The city council district or ward containing the point, in the 11 Tennessee cities above 25,000 people whose districts are drawn, and the member its own voters elect. In Memphis a point lies in one district and one super district, and the card names the members of both. The member each district's own voters elect, from the same city council roster the City or Town card reads (tn/data/app/tn-city-councils.json), written down from each city's own pages and proved against them by tn/scripts/build_tn_city_councils.py. Which seats a district elects was read from each city's charter. Its check holds every drawn district to a seat its voters elect and every such seat to a drawn district, bar the two cities whose districts are not drawn. The 11 Tennessee cities above 25,000 people that elect council members by district or ward and publish a map that can be drawn: Chattanooga, Clarksville, Cleveland, Columbia, Franklin, Gallatin, Hendersonville, Jackson, Memphis, Morristown and Mount Juliet, Chattanooga's and Hendersonville's from a published copy because the map server each city runs cannot be read. Nashville's 35 Metropolitan Council districts are the County Commission District layer's. Knoxville and Lebanon elect by district or ward too and are not drawn: the only copy of Knoxville's districts published as data, from Knoxville and Knox County's mapping agency (KGIS), reserves all rights and allows no copy without its written permission; and Lebanon publishes its wards only as PDF files. Spring Hill and Bristol tie seats to districts or wards and elect every one by the whole city, so a district there would elect no one of its own.
Tribal Governmenttribal-government Whether this address is on tribal land, and which nation's government answers for it — Tennessee has 1 such area, the Mississippi Band of Choctaw Indians' trust land near Henning. The Mississippi Band of Choctaw Indians' Tribal Chief and 17-member Tribal Council, from the nation's own Tribal Government 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. Tennessee — the trust land near Henning in Lauderdale County. Every other point in the state is on no tribal land. The rest of the same trust land is in Mississippi, which this fleet does not cover yet.

Public safety 2 layers

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
Police Stationpolice-station The three nearest police stations to the point, by straight-line distance, with each one's address. NO OFFICEHOLDER, AND NONE IS MISSING: a police station is a facility, not an elected district. Nobody is elected from one. Tennessee — 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 Stationfire-station The three nearest fire and EMS stations to the point, by straight-line distance, with each one's address. NO OFFICEHOLDER, AND NONE IS MISSING: a fire and EMS station is a facility, not an elected district. Nobody is elected from one. Tennessee — 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 4 layers

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
School District (Unified)school-district-unified The public school district covering the point, where one district runs every grade. NO OFFICEHOLDER, AND THE CARD SAYS SO. Tennessee's school boards are elected, and no statewide roster of their members was established in this pass; the card names the district, prints the grades the Census records and links the state Department of Education's school directory. Recorded as gap tn-school-board-members. Tennessee — every point outside the 15 city and special school districts. The unified and elementary tilings partition the state: their Census land areas sum to exactly the 95-county total, measured 2026-10-10.
School Board Districtschool-board-district The district a county board of education is elected from, and its county. The map does not say how many members a district elects, so the card says a district may elect more than one. NO NAMES YET. No statewide list of Tennessee's school board members has been read, so the card names no one rather than guessing; recorded as gap tn-school-board-members. The eighteen counties on the Comptroller's map: Blount, Chester, Claiborne, Crockett, Davidson, Fayette, Hardeman, Henry, Jefferson, Johnson, Lawrence, Macon, Madison, Sevier, Shelby, Sumner, Washington and Wilson. Tennessee's county boards of education are elected from districts under state law, and the other counties' districts are not drawn yet (gap tn-school-board-districts).
School District (Elementary)school-district-elementary The district running the lower grades at the point, where that is not a unified district. NO OFFICEHOLDER, AND THE CARD SAYS SO. Tennessee's school boards are elected, and no statewide roster of their members was established in this pass; the card names the district, prints the grades the Census records and links the state Department of Education's school directory. Recorded as gap tn-school-board-members. Tennessee — the 15 city and special school districts, 980 km2 of land between them. Everywhere else the unified card is the answer.
School District (Secondary)school-district-secondary The district running the high school at the point, where that is not a unified district. NO OFFICEHOLDER, AND THE CARD SAYS SO. Tennessee's school boards are elected, and no statewide roster of their members was established in this pass; the card names the district, prints the grades the Census records and links the state Department of Education's school directory. Recorded as gap tn-school-board-members. Tennessee — the same 15 places as the elementary layer, where the county's own district runs the high school. At each elementary district's interior point the secondary layer returned exactly one district and the unified layer none, 15 of 15.

Geography & amenities 6 layers

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

LayerWhat it answersBoundary sourceWho it namesWhere it applies
Countycounty Which county contains the point, and whether that county is consolidated with its principal city. None. The county's governing body is drawn by the County Commission District layer, which carries its districts and, county by county as each roster ships, its members. Tennessee — statewide, all 95 counties.
Civil Districtcounty-subdivision The civil district containing the point, and its county. NO OFFICEHOLDER. A civil district is a legal division of a Tennessee county that the Census Bureau records as having no functioning government (FUNCSTAT N): no one is elected to run it. The card says so, titles the unit "Civil District N", and says its number is not a county commission district number. Tennessee — statewide.
ZIP Codezip-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. 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. Tennessee. 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 (Bowling Green, Kentucky gives 42101).
Voting Precinctvoting-precinct The voting precinct containing the point — where a reader votes and how their ballots are reported. NO OFFICEHOLDER, and none is missing. A precinct elects nobody — it is an election-administration unit, not a district with a representative — so the card says that rather than leaving a reader to wonder which name is absent. Tennessee — statewide.
City or Townmunicipality The city or town containing the point, if any, and whether it is a consolidated city-county government. In the 28 cities and towns above 25,000 people, the mayor and every council member, alderman or commissioner, written down from each city's own pages and proved against those pages by tn/scripts/build_tn_city_councils.py, which fails when a name is no longer on the page it cites (tn/data/app/tn-city-councils.json). Where the page a seat cites prints an e-mail address or a telephone number beside that member alone, the card shows it, and the build proves it on that page in the same way; a line or mailbox the page gives the office or several members is not shown, and no street address is. Each seat says whether its district's own voters or the whole city elect it, read from each city's charter, because nothing the state publishes records it. Nashville's entry names its mayor and vice mayor, and its 40 council members are on the County Commission District card, which reads Davidson County's own list of them every week. Tennessee's other 317 cities and towns name nobody yet, recorded as gap tn-municipal-officeholders. Tennessee — statewide. A point outside every city and town is unincorporated, which the card states.
Post Officepost-office The three nearest post offices to the point, by straight-line distance, with each one's address. NO OFFICEHOLDER, AND NONE IS MISSING: a post office is a facility, not an elected district. Nobody is elected from one. Tennessee — 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.