Boundary Atlas

ZIP code 93036: Oxnard, CA

ZIP code 93036 is in Oxnard (80% of residents) and El Rio (14%), in Ventura County, California. 5.6% of its residents live outside city limits. It is in California's 26th congressional district. Its state senate district is State Senate District 21; its state house district is Assembly District 38.

48,656residents (2020 Census)
17.8 sq miland area
2cities and towns
1congressional district
55voting precincts

See it on the mapAll of California

City and county

City or townShare of ZIP residents
Oxnard80%
El Rio14%

CountyShare of ZIP residents
Ventura County100%

Town or county subdivisionShare of ZIP residents
Oxnard CCD99%
Las Posas CCD1.3%
Santa Paula CCD<0.1%

Congressional district

Congressional districtShare of ZIP residents
California's 26th congressional district (CA-26)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 21100%

State house districtShare of ZIP residents
Assembly District 38100%

Voting precincts

55 voting precincts overlap ZIP 93036. 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:93036")

ZIP 93036 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.