Boundary Atlas

Camp Pendleton Mainside, California

Camp Pendleton Mainside is a Census-designated place (an unincorporated community) in San Diego County, California, with 9,683 residents in 2020. It is in California's 49th congressional district. Its state senate district is State Senate District 38; its state house district is Assembly District 74.

9,683residents (2020 Census)
10.7 sq miland area
2ZIP codes
1congressional district

County

CountyShare of residents
San Diego County100%

Congressional district

Congressional districtShare of residents
California's 49th congressional district (CA-49)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CA-49)Mike Levin (D)202-225-3906100%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 38)Catherine Blakespear (Democratic)949-598-5850100%
Assembly Member (Assembly District 74)Laurie Davies (R)949-240-7300100%

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 residents
State Senate District 38100%

State house districtShare of residents
Assembly District 74100%

ZIP codes

Percentages mark ZIPs only partly in Camp Pendleton Mainside: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Camp Pendleton Mainside's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:0610554")

Camp Pendleton Mainside here is the Census Bureau's place boundary as of January 1, 2025 (a Census-designated place, which has no municipal government). Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.