Boundary Atlas

Walnut, California

Walnut is a city in Los Angeles County, California, with 28,430 residents in 2020. It is in California's 31st congressional district. Its state senate district is State Senate District 30; its state house district is Assembly District 56.

28,430residents (2020 Census)
9.0 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Los Angeles County100%

Congressional district

Congressional districtShare of residents
California's 31st congressional district (CA-31)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CA-31)Gilbert Ray Cisneros, Jr. (D)202-225-5256100%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 30)Bob Archuleta (Democratic)562-406-1001100%
Assembly Member (Assembly District 56)Lisa Calderon (Democratic)562-692-5858100%

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: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of residents
State Senate District 30100%

State house districtShare of residents
Assembly District 56100%

ZIP codes

Percentages mark ZIPs only partly in Walnut: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Walnut's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:0683332")

Walnut here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.