ZIP code 94542: Hayward, CA
ZIP code 94542 is in Hayward (94% of residents) and Fairview (6.3%), in Alameda County, California. It is in California's 14th congressional district. Its state senate districts are State Senate District 10 (100%) and State Senate District 9 (<0.1%); its state house district is Assembly District 20.
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Hayward | 94% |
| Fairview | 6.3% |
| County | Share of ZIP residents |
|---|---|
| Alameda County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Hayward CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| California's 14th congressional district (CA-14) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-14) | Aisha Wahab (D) | 202-225-5065 | 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 | <0.1% |
| Assembly Member (Assembly District 20) | Liz Ortega (Democratic) | 510-583-8818 | 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
- Hayward website: https://hayward-ca.gov
- Hayward laws: search for the Hayward, California code of ordinances
- Fairview laws: search for the Fairview, California code of ordinances
- Alameda County website: https://www.acgov.org/
- Alameda County laws: search for the Alameda County, California code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 10 | 100% |
| State Senate District 9 | <0.1% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 20 | 100% |
Voting precincts
17 voting precincts overlap ZIP 94542. 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:94542")
ZIP 94542 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.