ZIP code 94931: Cotati, CA
ZIP code 94931 is in Cotati (83% of residents), in Sonoma County, California. 17% of its residents live outside city limits. It is in California's 4th congressional district (100%) and California's 2nd congressional district (0.4%). Its state senate districts are State Senate District 3 (83%) and State Senate District 2 (17%); its state house district is Assembly District 12.
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Cotati | 83% |
| Penngrove | 0.5% |
| County | Share of ZIP residents |
|---|---|
| Sonoma County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Petaluma CCD | 98% |
| Sebastopol CCD | 1.8% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| California's 4th congressional district (CA-04) | 100% |
| California's 2nd congressional district (CA-02) | 0.4% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-04) | Mike Thompson (D) | 202-225-3311 | 100% |
| U.S. Representative (CA-02) | Jared Huffman (D) | 202-225-5161 | 0.4% |
| 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 3) | Christopher Cabaldon (Democratic) | 707-454-3808 | 83% |
| State Senator (State Senate District 2) | Mike McGuire (Democratic) | 707-468-8914 | 17% |
| Assembly Member (Assembly District 12) | Damon Connolly (Democratic) | 415-479-4920 | 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
- Cotati laws: search for the Cotati, California code of ordinances
- Sonoma County website: https://sonomacounty.gov/
- Sonoma County laws: search for the Sonoma County, California code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 3 | 83% |
| State Senate District 2 | 17% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 12 | 100% |
Voting precincts
11 voting precincts overlap ZIP 94931. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:94931")
ZIP 94931 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.