Boundary Atlas

California's 15th congressional district (CA-15)

California's 15th congressional district (CA-15) covers parts or all of San Mateo County and San Francisco County, and 24 ZIP codes (16 wholly inside it). Its 2020 population was 759,058. This is the map in force for the November 3, 2026 election.

759,058residents (2020 Census)
2counties
24ZIP codes
305voting precincts

Who represents CA-15

OfficeMemberContact
U.S. Representative (CA-15)Kevin Mullin (D)202-225-3531
U.S. SenatorAdam B. Schiff (D)202-224-3841
U.S. SenatorAlex Padilla (D)202-224-3553 · contact form

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: Members of Congress: the @unitedstates project, congress-legislators (CC0).

Counties

CountyShare of the county's residents in CA-15
San Mateo County84%
San Francisco County13%

ZIP codes

Percentages mark ZIPs only partly in CA-15: the share of that ZIP's residents inside it.

Towns

South San Francisco CCD, San Mateo CCD, Merced-McLaren CCD and Bayview CCD.

Get this in your AI agent

Your agent can draw every precinct in CA-15, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

get_boundaries(id="us:congressional_district:0615", children_level="precinct", include_districts=True)