Alum Rock, California
Alum Rock is a Census-designated place (an unincorporated community) in Santa Clara County, California, with 11,873 residents in 2020. It is in California's 18th congressional district. It spans 2 state senate and 2 state house districts.
County
| County | Share of residents |
|---|---|
| Santa Clara County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| California's 18th congressional district (CA-18) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-18) | Zoe Lofgren (D) | 202-225-3072 | 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 15) | Dave Cortese (Democratic) | 408-723-4154 | 93% |
| Assembly Member (Assembly District 25) | Ash Kalra (Democratic) | 408-286-2535 | 93% |
| Assembly Member (Assembly District 24) | Alex Lee (Democratic) | 408-262-2501 | 6.7% |
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
- Alum Rock laws: search for the Alum Rock, California code of ordinances
- Santa Clara County website: https://www.santaclaracounty.gov/
- Santa Clara County laws: search for the Santa Clara County, California code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 15 | 93% |
| State Senate District 10 | 6.9% |
| State house district | Share of residents |
|---|---|
| Assembly District 25 | 93% |
| Assembly District 24 | 6.7% |
ZIP codes
Percentages mark ZIPs only partly in Alum Rock: the share of that ZIP's residents living in it.
- 95127 (19%)
Get this in your AI agent
Your agent can get Alum Rock'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:0601458")
Alum Rock 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.