Boundary Atlas

ZIP code 37403: Chattanooga, TN

ZIP code 37403 is in Chattanooga, in Hamilton County, Tennessee. It is in Tennessee's 3rd congressional district. Its state senate districts are State Senate District 10 (91%) and State Senate District 11 (8.9%); its state house districts are State House District 28 (61%), State House District 26 (39%) and State House District 27 (0.4%).

5,666residents (2020 Census)
1.7 sq miland area
1cities and towns
1congressional district
4voting precincts

See it on the mapAll of Tennessee

City and county

City or townShare of ZIP residents
Chattanooga100%

CountyShare of ZIP residents
Hamilton County100%

Town or county subdivisionShare of ZIP residents
District 4100%

Congressional district

Congressional districtShare of ZIP residents
Tennessee's 3rd congressional district (TN-03)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1091%
State Senate District 118.9%

State house districtShare of ZIP residents
State House District 2861%
State House District 2639%
State House District 270.4%

Voting precincts

4 voting precincts overlap ZIP 37403. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:37403")

ZIP 37403 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.