ZIP code 94595: Walnut Creek, CA
ZIP code 94595 is in Walnut Creek (61% of residents), Saranap (33%) and Castle Hill (6.4%), 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 district is Assembly District 16.
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Walnut Creek | 61% |
| Saranap | 33% |
| Castle Hill | 6.4% |
| 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 | 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
- Walnut Creek laws: search for the Walnut Creek, California code of ordinances
- Saranap laws: search for the Saranap, California code of ordinances
- Castle Hill laws: search for the Castle Hill, 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 | 100% |
Voting precincts
9 voting precincts overlap ZIP 94595. 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:94595")
ZIP 94595 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.