ZIP code 90603: Whittier, CA
ZIP code 90603 is in Whittier, in Los Angeles County, California. It is in California's 41st congressional district. Its state senate district is State Senate District 30; its state house district is Assembly District 56.
See it on the mapAll of California
City and county
| City or town | Share of ZIP residents |
|---|---|
| Whittier | 100% |
| County | Share of ZIP residents |
|---|---|
| Los Angeles County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Whittier CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| California's 41st congressional district (CA-41) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CA-41) | Ken Calvert (R) | 202-225-1986 | 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 30) | Bob Archuleta (Democratic) | 562-406-1001 | 100% |
| Assembly Member (Assembly District 56) | Lisa Calderon (Democratic) | 562-692-5858 | 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
- Whittier website: http://www.cityofwhittier.org
- Whittier laws: search for the Whittier, California code of ordinances
- Los Angeles County website: https://lacounty.gov
- Los Angeles County laws: search for the Los Angeles County, California code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 30 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 56 | 100% |
Voting precincts
9 voting precincts overlap ZIP 90603. 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:90603")
ZIP 90603 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.