Boundary Atlas

ZIP code 61201: Rock Island, IL

ZIP code 61201 is in Rock Island (99% of residents), in Rock Island County, Illinois. It is in Illinois's 17th congressional district. Its state senate district is State Senate District 36; its state house district is State House District 72.

37,366residents (2020 Census)
17.9 sq miland area
2cities and towns
1congressional district
37voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Rock Island99%
Rock Island Arsenal0.5%

CountyShare of ZIP residents
Rock Island County100%

Town or county subdivisionShare of ZIP residents
South Rock Island township49%
Rock Island township43%
Blackhawk township6.8%
South Moline township0.5%
Moline township0.3%

Congressional district

Congressional districtShare of ZIP residents
Illinois's 17th congressional district (IL-17)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 36100%

State house districtShare of ZIP residents
State House District 72100%

Voting precincts

37 voting precincts overlap ZIP 61201. 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:61201")

ZIP 61201 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.