ZIP code 94597: Walnut Creek, CA
ZIP code 94597 is in Walnut Creek (65% of residents), Contra Costa Centre (27%) and Acalanes Ridge (5.4%), in Contra Costa County, California. It is in California's 10th congressional district. Its state senate district is State Senate District 9; its state house districts are Assembly District 16 (99%) and Assembly District 15 (1.5%).
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Walnut Creek | 65% |
| Contra Costa Centre | 27% |
| Acalanes Ridge | 5.4% |
| Lafayette | 0.2% |
| County | Share of ZIP residents |
|---|---|
| Contra Costa County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Central Contra Costa CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| California's 10th congressional district (CA-10) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-10) | Mark DeSaulnier (D) | 202-225-2095 | 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 9) | Tim Grayson (Democratic) | 925-258-1176 | 100% |
| Assembly Member (Assembly District 16) | Rebecca Bauer-Kahan (Democratic) | 925-244-1600 | 99% |
| Assembly Member (Assembly District 15) | Anamarie Avila Farias (Democratic) | 925-521-1511 | 1.5% |
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
- Walnut Creek laws: search for the Walnut Creek, California code of ordinances
- Contra Costa Centre laws: search for the Contra Costa Centre, California code of ordinances
- Acalanes Ridge laws: search for the Acalanes Ridge, California code of ordinances
- Contra Costa County website: https://www.contracosta.ca.gov/
- Contra Costa County laws: search for the Contra Costa County, California code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 9 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 16 | 99% |
| Assembly District 15 | 1.5% |
Voting precincts
21 voting precincts overlap ZIP 94597. 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:94597")
ZIP 94597 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.