Add the Congressional District to Every U.S. Address in a List

Batch-append the 118th+ congressional district (GEOID) to your address list using the free official Census Geocoder. No API key.

How it works

  1. Open GeoFlow
  2. Paste your addresses (one per line) or upload a CSV and pick the address column
  3. Click Run — each address is matched against the free U.S. Census Bureau Geocoder
  4. Download the enriched CSV

Example output

Input addressCountyCongressionalState Senate (SLDU)Assembly (SLDL)Timezone
1600 Pennsylvania Ave NW, Washington, DC 20500District of Columbia (11001)1198 — Delegate District (at Large)Ward 2 (11002)— (DC has no lower chamber)America/New_York
350 5th Ave, New York, NY 10118New York County (36061)3612 — NY 12th DistrictState Senate 28 (36028)Assembly 75 (36075)America/New_York
1 Market St, San Francisco, CA 94105San Francisco County (06075)0611 — CA 11th DistrictState Senate 11 (06011)Assembly 17 (06017)America/Los_Angeles

Try it free

Open GeoFlow — free during beta

Data source: U.S. Census Bureau Geocoder (public domain). Timezone: tz-lookup (MIT).

FAQ

Which Congress is returned?

The district currently in effect (e.g. the 119th Congress era districts). The GEOID is state FIPS + district number.

What about DC and at-large states?

DC returns 1198 (Delegate District, at Large). At-large states return code 98.