Castaic, California
Castaic is a Census-designated place (an unincorporated community) in Los Angeles County, California, with 18,937 residents in 2020. It is in California's 26th congressional district. Its state senate district is State Senate District 23; its state house district is Assembly District 40.
County
| County | Share of residents |
|---|---|
| Los Angeles County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| California's 26th congressional district (CA-26) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-26) | Julia Brownley (D) | 202-225-5811 | 100% |
| U.S. Senator | Adam B. Schiff (D) | 202-224-3841 | statewide |
| U.S. Senator | Alex Padilla (D) | 202-224-3553 · contact form | statewide |
| State Senator (State Senate District 23) | Suzette Valladares (R) | 661-729-6232 | 100% |
| Assembly Member (Assembly District 40) | Pilar Schiavo (Democratic) | 661-286-1565 | 100% |
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
- Castaic laws: search for the Castaic, California code of ordinances
- Los Angeles County website: https://lacounty.gov
- Los Angeles County laws: search for the Los Angeles County, California code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 23 | 100% |
| State house district | Share of residents |
|---|---|
| Assembly District 40 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Castaic: the share of that ZIP's residents living in it.
- 91384 (66%)
Get this in your AI agent
Your agent can get Castaic'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:0611796")
Castaic 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.