U.S. House · Proposition 50 Lines

Congressional District 31

Gil Cisneros (Democratic), re-elected in 2026

Who represents this district

Gil Cisneros (Democratic) was re-elected on November 3, 2026.

Counties and cities

Counties: Los Angeles (partial), San Bernardino (partial)

Principal cities and communities:

West CovinaPomona (partial)Chino (partial)CovinaGlendoraAzusaMontclair (partial)La Puente

Voter registration

Registered voters	Democratic	Republican	Other
457,541	43.79%	25.72%	30.49%

Secretary of State Report of Registration, September 4, 2026. Other covers every registrant not registered Democratic or Republican.

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Registration: California Secretary of State, Report of Registration, September 4, 2026. 2026 results: Associated Press calls for U.S. House races; state legislative results compiled from Ballotpedia and JoinCalifornia against semi-official returns. District lines: congressional districts are the Proposition 50 (AB 604) map; State Senate and Assembly districts are the 2021 Citizens Redistricting Commission maps.