Boundary Atlas

Stevenson Ranch, California

Stevenson Ranch is a Census-designated place (an unincorporated community) in Los Angeles County, California, with 20,178 residents in 2020. It is in California's 27th congressional district. Its state senate district is State Senate District 23; its state house district is Assembly District 40.

20,178residents (2020 Census)
6.4 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Los Angeles County100%

Congressional district

Congressional districtShare of residents
California's 27th congressional district (CA-27)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CA-27)George Whitesides (D)202-225-1956100%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 23)Suzette Valladares (R)661-729-6232100%
Assembly Member (Assembly District 40)Pilar Schiavo (Democratic)661-286-1565100%

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 23100%

State house districtShare of residents
Assembly District 40100%

ZIP codes

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

Get this in your AI agent

Your agent can get Stevenson Ranch's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:0674130")

Stevenson Ranch here is the Census Bureau's place boundary as of January 1, 2025 (a Census-designated place, which has no municipal government). Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.