California's 12th congressional district (CA-12)
California's 12th congressional district (CA-12) lies within Alameda County, and 30 ZIP codes (23 wholly inside it). Its 2020 population was 758,548. This is the map in force for the November 3, 2026 election.
Who represents CA-12
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (CA-12) | Lateefah Simon (D) | 202-225-2661 |
| U.S. Senator | Adam B. Schiff (D) | 202-224-3841 |
| U.S. Senator | Alex Padilla (D) | 202-224-3553 · contact form |
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: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in CA-12 |
|---|---|
| Alameda County | 45% |
ZIP codes
Percentages mark ZIPs only partly in CA-12: the share of that ZIP's residents inside it.
- 94501
- 94502
- 94577 (95%)
- 94578 (30%)
- 94579 (57%)
- 94601
- 94602
- 94603
- 94605
- 94606
- 94607
- 94608
- 94609
- 94610
- 94611
- 94612
- 94613
- 94618
- 94619 (100%)
- 94621
- 94702
- 94703
- 94704
- 94705
- 94706 (100%)
- 94707 (75%)
- 94708 (80%)
- 94709
- 94710
- 94720
Towns
Alameda CCD, Berkeley CCD, Oakland CCD and Hayward CCD.
Get this in your AI agent
Your agent can draw every precinct in CA-12, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:0612", children_level="precinct", include_districts=True)