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: September 3, 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.
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 and legislative-district boundaries.
- unitedstates/congress-legislators U.S. House roster (CC0).
- Open States Michigan Senate and House roster base.
- Michigan Senate Senate Capitol phone, office and contact page.
The layer matrix
10 layers — 5 political and legislative, 2 schools, 3 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 5 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 |
|---|---|---|---|---|
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. | Michigan — statewide, all 13 districts. | |
Michigan Senate Districtmi-senate |
The Michigan Senate district covering the point, and the senator holding it. | mi-senate-members.json, rebuilt weekly by CI — the Open States current-people export (name, party, e-mail, personal site) merged with the Michigan Senate's own all-senators directory, which publishes a Capitol phone, e-mail, office building and contact page for all 38 seats. Open States carries no capitol address or phone for any Michigan legislator (measured 0 of 148), so that contact block comes entirely from the Senate's own directory. | Michigan — statewide, all 38 districts. | |
Michigan House Districtmi-house |
The Michigan House district covering the point, and the representative holding it. | mi-house-members.json, rebuilt weekly by CI from the Open States current-people export (name, party, e-mail, personal site) — all 110 seats. NO CAPITOL CONTACT BLOCK SHIPS FOR THE HOUSE, and that is a measurement rather than an omission: Open States carries no capitol phone or address for any Michigan legislator, and house.mi.gov could not be reached from this project's build environment (TLS: "unable to get local issuer certificate", with the egress proxy's CA bundle explicitly supplied, while senate.michigan.gov answers 200 on identical flags). Whether that is the House site's own incomplete certificate chain or an artifact of this sandbox is unresolved and carries one CI-side probe before it is recorded as anything more — see mi/WATCH.md. | Michigan — statewide, all 110 districts. | |
County Commissioner Districtcounty-commissioner |
The county commissioner district covering the point, its county, and the population it was apportioned on. | NONE, and that is a measurement rather than an omission. The source carries a Commissioner and Party on every one of its 619 polygons, which looks like a free roster and is not one: the item's own description says the values were "derived from the canvased November 2024 election results", so the column is a list of CERTIFIED ELECTION WINNERS, not of officeholders. That is why it is 100% filled — a district always has a winner — and the fill rate is evidence against maintenance, not for it. Measured 2026-09-03 across 12 counties read district-by-district against their own board pages (123 districts) plus ~40 more in a second pass: 93.5% named the right person, and every single miss ran the same direction, the layer naming the 2024 winner and the county naming their replacement. Wayne County District 5 still names a commissioner who died on 10 June 2025. Four further rows misspell a real surname. So the names are dropped at the build rather than shipped with a caveat, and the honest route to Michigan commissioner names — each county's own board page — is a later change with its own weekly refresh. Recorded as gap mi-commissioner-roster. | Michigan — statewide, all 83 counties, 619 districts. Every Michigan county elects its commissioners by single-member district (MCL 46.401-46.405); none elects at large, so a polygon is the honest surface everywhere. | |
Precinctprecinct |
The voting precinct covering the point, its county, and how many voters were registered in it for the 2026 cycle. | NO OFFICEHOLDER — a precinct elects nobody; it is the unit a ballot is counted in. AND NO POLLING PLACE, which here is a fact about the source rather than a decision: the layer carries no polling field at all, so unlike Iowa's precinct builder there is nothing to decline. The card names the state's own caveat instead — the Bureau collects this from local election officials and says validation was "done by most, but not all" jurisdictions — and points a reader at their clerk. | Michigan — statewide, all 3,895 precincts across all 83 counties, as drawn for the 2026 election cycle. Every precinct's county-subdivision key resolves against the Census MCD fabric this instance ships (1,530 of 1,530 distinct keys, measured 2026-09-04 — the same 1,530 on the 2024 map, because the consolidation happened WITHIN municipalities rather than between them), so the precinct and the Township or City card agree on which local government a point sits in. The state's voting-equipment column is deliberately not fetched: it changes on a different clock from the boundary. |
Schools 2 layers
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 (Unified)school-district-unified |
The unified (K-12) school district covering the point. | NO OFFICEHOLDER, AND THE CARD NAMES THE DISTRICT ONLY. Michigan school boards are elected (MCL 380.11a et seq.), and no statewide roster of the ~540 boards' members was found in the research pass — recorded as gap mi-school-board-members rather than guessed at. Per-district rosters are later phase work. | Michigan — statewide. Together with the 27 elementary districts this tiles the state; the two never overlap. | |
School District (Elementary)school-district-elementary |
The elementary school district covering the point, in the 27 places Michigan runs one. | NO OFFICEHOLDER — the same gap as the unified layer (mi-school-board-members); the card names the district only. | Michigan — the 27 districts that operate no high school of their own. These are GAP-FILLS, not overlays: measured 2026-09-04 at all 27 TIGER interior points, the unified layer returns nothing, and at every unified district's interior point this layer returns nothing. Shipping unified alone would answer 'no school district' to everyone living in one of the 27. |
Geography & amenities 3 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 |
|---|---|---|---|---|
Countycounty |
Which county contains the point. | None yet — identity only. Michigan's county boards of commissioners are elected by district, and the state publishes every county's commissioner districts (with the commissioner's own name and party) as a single statutory filing under MCL 46.404/46.405; that is this instance's flagship layer and ships in its own change rather than being half-joined here. The card names the county and claims nothing about who runs it. | Michigan — statewide, all 83 counties. | |
Township or Citycounty-subdivision |
The township covering the point, or the Census placeholder record for the city that stands in place of one — and which of the two it is. | NO OFFICEHOLDER, AND THE CARD SAYS SO. Michigan townships elect a supervisor, clerk, treasurer and trustees (MCL 41.61; MCL 42.3 for charter townships), and no statewide roster of them was found in the research pass — recorded as gap mi-township-officers. The card names the office and states plainly that this app does not know who holds it. The 301 city records and the 40 water records are Census bookkeeping constructs, not governments, so no roster claim applies to them at all. | Michigan — statewide, all 1,581 records. The charter/general-law distinction is read from TIGER's own NAME suffix rather than a second source, so it cannot go stale against the name printed above it: measured 2026-09-04, the four LSADC values yield exactly four suffixes across 1,581 of 1,581 records. | |
City or Villagemunicipality |
The incorporated city or village covering the point, if any — and which of the two it is, because in Michigan that changes what else governs the point. | NO OFFICEHOLDER, AND THE CARD SAYS SO — no statewide source names Michigan's mayors, village presidents, council members or clerks; the Michigan Municipal League's directory is membership-facing and the state publishes no aggregate. Recorded as gap mi-municipal-officeholders. Per-municipality rosters are later phase work, the route every other instance took. | Michigan — statewide, all 533 incorporated places. A CITY is independent of any township; a VILLAGE remains part of one, so a village resident has two general-purpose local governments and each card names the other. Measured 2026-09-04: all 252 villages land inside a township at their TIGER interior point (235 general-law, 17 charter), zero exceptions, and the Census's own place class codes agree — every village is C1, 'does not serve as a county subdivision equivalent'. |