U.S. House · Proposition 50 Lines

Congressional District 48

Member-elect: Marni von Wilpert (Democratic)

Who represents this district

Marni von Wilpert (Democratic), member-elect. The new term begins January 3, 2027.

Current officeholder: Darrell Issa (Republican), in office until the new term begins. The incumbent did not run for re-election.

Counties and cities

Counties: Riverside (partial), San Diego (partial)

Principal cities and communities:

San MarcosVistaEscondido (partial)TemeculaHemetPalm SpringsOceanside (partial)

Voter registration

Registered voters	Democratic	Republican	Other
463,047	37.01%	32.16%	30.83%

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.