Boundary Atlas

ZIP code 90731: Los Angeles, CA

ZIP code 90731 is in Los Angeles (98% of residents), in Los Angeles County, California. It is in California's 44th congressional district. Its state senate district is State Senate District 35; its state house districts are Assembly District 65 (70%) and Assembly District 66 (30%).

61,270residents (2020 Census)
9.3 sq miland area
1cities and towns
1congressional district
22voting precincts

See it on the mapAll of California

City and county

City or townShare of ZIP residents
Los Angeles98%

CountyShare of ZIP residents
Los Angeles County100%

Town or county subdivisionShare of ZIP residents
Los Angeles CCD100%
Long Beach-Lakewood CCDland only

Congressional district

Congressional districtShare of ZIP residents
California's 44th congressional district (CA-44)100%
California's 42nd congressional district (CA-42)land only

Elected officials

OfficeMemberContactShare of residents
MayorKaren Bass213-978-060098%
U.S. Representative (CA-44)Nanette Diaz Barragán (D)202-225-8220100%
U.S. Representative (CA-42)Robert Garcia (D)202-225-7924<0.1%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 35)Laura Richardson (Democratic)310-514-8573100%
State Senator (State Senate District 33)Lena Gonzalez (Democratic)562-256-7921<0.1%
Assembly Member (Assembly District 65)Mike Gipson (Democratic)310-324-640870%
Assembly Member (Assembly District 66)Al Muratsuchi (Democratic)310-375-069130%
Assembly Member (Assembly District 69)Josh Lowenthal (Democratic)562-366-2769<0.1%

Elected in 2024 under CA's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).

Officials serving now (members of Congress until January 3, 2027). Sources: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 35100%
State Senate District 33land only

State house districtShare of ZIP residents
Assembly District 6570%
Assembly District 6630%
Assembly District 69land only

Voting precincts

22 voting precincts overlap ZIP 90731. 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:90731")

ZIP 90731 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.