Boundary Atlas

ZIP code 44121: South Euclid, OH

ZIP code 44121 is in South Euclid (59% of residents), Cleveland Heights (34%), Cleveland (5.6%) and University Heights (1.3%), in Cuyahoga County, Ohio. It is in Ohio's 11th congressional district. Its state senate district is State Senate District 21; its state house districts are State House District 21 (66%) and State House District 18 (34%).

32,887residents (2020 Census)
6.4 sq miland area
4cities and towns
1congressional district
28voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
South Euclid59%
Cleveland Heights34%
Cleveland5.6%
University Heights1.3%

CountyShare of ZIP residents
Cuyahoga County100%

Town or county subdivisionShare of ZIP residents
South Euclid city59%
Cleveland Heights city34%
Cleveland city5.6%
University Heights city1.3%

Congressional district

Congressional districtShare of ZIP residents
Ohio's 11th congressional district (OH-11)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 21100%

State house districtShare of ZIP residents
State House District 2166%
State House District 1834%

Voting precincts

28 voting precincts overlap ZIP 44121. 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:44121")

ZIP 44121 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.