California State Assembly · 2021 Lines

Assembly District 66

Al Muratsuchi (Democratic); 2026 result pending, Paul Seo leading

Who represents this district

Current officeholder: Al Muratsuchi (Democratic).

2026 result pending. Paul Seo (Democratic) is leading in the current count. The race has not been called, and a leader is not a winner until it is.

323,682Registered voters

D +16.7Registration margin

2026 result not yet calledSeat status

Counties and cities

Counties: Los Angeles (partial)

Principal cities and communities:

TorranceRedondo BeachHermosa BeachManhattan BeachGardenaPalos Verdes EstatesRancho Palos VerdesRolling Hills EstatesLos Angeles

Voter registration

Registered voters	Democratic	Republican	Other
323,682	43.3%	26.6%	30.1%

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

Capitol Daybook Research

Research access

The full district files are available to Capitol Daybook Research clients. A Capitol Daybook subscription does not include research access.

The full district file carries registration trends across the recent Secretary of State reports, 2024 presidential results computed on the current district lines, 2026 campaign finance totals with independent expenditures, and CSV downloads of the district tables.

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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.