atlas.

US address → legislative districts

Give it an address, a lat/lng, or a ZIP — get back the congressional, state senate, and state house districts.

Find your districts

Status

operational

Congressional

441

State leg. (U/L)

1,952/4,834

ZIP centroids

33,791

Example

$ curl -H "x-api-key: <your-key>" \
    https://atlas.supercitizen.org/v1/districts?zip=19901

{
  "input": { "zip": "19901" },
  "location": {
    "lat": 39.157, "lng": -75.521, "source": "zip-centroid"
  },
  "state": "DE",
  "zip": "19901",
  "congressional_district": "0",  // "0" = at-large
  "state_senate_district": "17",
  "state_house_district": "32"
}

Send x-api-key: <your-key> (or Authorization: Bearer).

GET /v1/districts

Provide exactly one of: address, zip, or lat+lng.
Returns state, congressional_district, state_senate_district, state_house_district, and the resolved location.
Address geocoding via census; ZIP and lat/lng resolve offline.