California's 9th congressional district (CA-09)
California's 9th congressional district (CA-09) covers parts or all of San Joaquin County and Contra Costa County, and 31 ZIP codes (9 wholly inside it). Its 2020 population was 762,401. This is the map in force for the November 3, 2026 election.
Who represents CA-09
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (CA-09) | Josh Harder (D) | 202-225-4540 |
| 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-09 |
|---|---|
| San Joaquin County | 70% |
| Contra Costa County | 18% |
ZIP codes
Percentages mark ZIPs only partly in CA-09: the share of that ZIP's residents inside it.
- 94509
- 94511
- 94513 (0.1%)
- 94531
- 94561 (45%)
- 94565 (76%)
- 95202 (74%)
- 95203 (68%)
- 95204
- 95205 (16%)
- 95206 (40%)
- 95207
- 95209 (100%)
- 95210
- 95211
- 95212
- 95215 (45%)
- 95219 (100%)
- 95231 (47%)
- 95237 (7.6%)
- 95240 (39%)
- 95242 (1.6%)
- 95253 (79%)
- 95304 (83%)
- 95330 (0.2%)
- 95336 (99%)
- 95337 (94%)
- 95366 (92%)
- 95376
- 95377 (99%)
- 95391 (100%)
Towns
Tracy CCD, Ripon CCD, Antioch-Pittsburg CCD, Thornton CCD, Manteca CCD, Stockton CCD, Lodi CCD, Tassajara CCD, East Contra Costa CCD, Lockeford CCD, Central Contra Costa CCD and Linden-Farmington CCD.
Get this in your AI agent
Your agent can draw every precinct in CA-09, 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:0609", children_level="precinct", include_districts=True)