ZIP code 94516: Contra Costa County, CA
ZIP code 94516 is in Contra Costa County, California, outside any city or Census-designated place. 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
Outside any city or Census-designated place.
| 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% |
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% |
| Assembly District 14 | land only |
Voting precincts
7 voting precincts overlap ZIP 94516. 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:94516")
ZIP 94516 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.