Boundary Atlas

ZIP code 93405: San Luis Obispo, CA

ZIP code 93405 is in San Luis Obispo (88% of residents) and Avila Beach (1.5%), in San Luis Obispo County, California. 10% of its residents live outside city limits. It is in California's 24th congressional district. Its state senate district is State Senate District 17; its state house district is Assembly District 30.

23,331residents (2020 Census)
89.7 sq miland area
3cities and towns
1congressional district
14voting precincts

See it on the mapAll of California

City and county

City or townShare of ZIP residents
San Luis Obispo88%
Avila Beach1.5%
California Polytechnic State University0.8%

CountyShare of ZIP residents
San Luis Obispo County100%

Town or county subdivisionShare of ZIP residents
San Luis Obispo CCD99%
North Coast CCD1.3%

Congressional district

Congressional districtShare of ZIP residents
California's 24th congressional district (CA-24)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CA-24)Salud O. Carbajal (D)202-225-3601100%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 17)John Laird (Democratic)831-657-6315100%
Assembly Member (Assembly District 30)Dawn Addis (Democratic)831-649-2832100%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 17100%

State house districtShare of ZIP residents
Assembly District 30100%

Voting precincts

14 voting precincts overlap ZIP 93405. 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:93405")

ZIP 93405 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.