Boundary Atlas

ZIP code 50009: Altoona, IA

ZIP code 50009 is in Altoona (92% of residents), in Polk County, Iowa. 7.7% of its residents live outside city limits. It is in Iowa's 3rd congressional district. Its state senate districts are State Senate District 20 (98%) and State Senate District 23 (2.2%); its state house districts are State House District 40 (97%), State House District 45 (2.2%) and State House District 39 (1.2%).

21,230residents (2020 Census)
27.9 sq miland area
3cities and towns
1congressional district
12voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Altoona92%
Des Moines0.1%
Bondurant<0.1%

CountyShare of ZIP residents
Polk County100%

Town or county subdivisionShare of ZIP residents
Clay township96%
Beaver township2.0%
Delaware township1.7%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2098%
State Senate District 232.2%

State house districtShare of ZIP residents
State House District 4097%
State House District 452.2%
State House District 391.2%

Voting precincts

12 voting precincts overlap ZIP 50009. 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:50009")

ZIP 50009 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.