Union City, California
Union City is a city in Alameda County, California, with 70,143 residents in 2020. It is in California's 14th congressional district. Its state senate district is State Senate District 10; its state house district is Assembly District 20.
County
| County | Share of residents |
|---|---|
| Alameda County | 100% |
Congressional district
| Congressional district | Share of 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 |
| 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
- Union City website: https://www.unioncity.org/
- Union City laws: search for the Union City, 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 residents |
|---|---|
| State Senate District 10 | 100% |
| State house district | Share of residents |
|---|---|
| Assembly District 20 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Union City: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Union City's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:0681204")
Union City here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.