Boundary Atlas

ZIP code 91030: South Pasadena, CA

ZIP code 91030 is in South Pasadena, in Los Angeles County, California. It is in California's 28th congressional district. Its state senate district is State Senate District 25; its state house district is Assembly District 49.

26,927residents (2020 Census)
3.4 sq miland area
1cities and towns
1congressional district
7voting precincts

See it on the mapAll of California

City and county

City or townShare of ZIP residents
South Pasadena100%

CountyShare of ZIP residents
Los Angeles County100%

Town or county subdivisionShare of ZIP residents
Pasadena CCD100%
Los Angeles CCDland only

Congressional district

Congressional districtShare of ZIP residents
California's 28th congressional district (CA-28)100%
California's 34th congressional district (CA-34)land only

State legislative districts

State senate districtShare of ZIP residents
State Senate District 25100%
State Senate District 26land only

State house districtShare of ZIP residents
Assembly District 49100%
Assembly District 52land only

Voting precincts

7 voting precincts overlap ZIP 91030. 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:91030")

ZIP 91030 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.