Boundary Atlas

ZIP code 62037: Grafton, IL

ZIP code 62037 is in Grafton (35% of residents), in Jersey County, Illinois. 65% of its residents live outside city limits. It is in Illinois's 15th congressional district. Its state senate district is State Senate District 50; its state house district is State House District 100.

1,779residents (2020 Census)
57.4 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of Illinois

City and county

City or townShare of ZIP residents
Grafton35%

CountyShare of ZIP residents
Jersey County100%

Town or county subdivisionShare of ZIP residents
Quarry township58%
Otter Creek township30%
Rosedale township8.5%
Mississippi township2.2%
Elsah township1.8%

Congressional district

Congressional districtShare of ZIP residents
Illinois's 15th congressional district (IL-15)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 50100%

State house districtShare of ZIP residents
State House District 100100%

Voting precincts

6 voting precincts overlap ZIP 62037. 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:62037")

ZIP 62037 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.