Boundary Atlas

March ARB, California

March ARB is a Census-designated place (an unincorporated community) in Riverside County, California, with 816 residents in 2020. It is in California's 39th congressional district. It spans 2 state house districts. Its state senate district is State Senate District 32.

816residents (2020 Census)
11.9 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Riverside County100%

Congressional district

Congressional districtShare of residents
California's 39th congressional district (CA-39)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CA-39)Mark Takano (D)202-225-2305100%
U.S. SenatorAdam B. Schiff (D)202-224-3841statewide
U.S. SenatorAlex Padilla (D)202-224-3553 · contact formstatewide
State Senator (State Senate District 32)Kelly Seyarto (R)951-280-1260100%
Assembly Member (Assembly District 60)Corey Jackson (Democratic)951-653-096061%
Assembly Member (Assembly District 63)Natasha Johnson (R)951-277-363939%

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 32100%

State house districtShare of residents
Assembly District 6061%
Assembly District 6339%

ZIP codes

Percentages mark ZIPs only partly in March ARB: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get March ARB's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:0645680")

March ARB 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.