California State Senate · 2021 Lines

State Senate District 1

Megan Dahle (Republican)

Who represents this district

Current officeholder: Megan Dahle (Republican).

This seat was not on the 2026 ballot. Its next election is in 2028.

Open seat in 2028: the officeholder is term-limited and cannot run for this seat again.

Counties and cities

Counties: Butte, Colusa, Glenn, Lassen, Modoc, Nevada (partial), Placer (partial), Plumas, Shasta, Sierra, Siskiyou, Sutter, Tehama, Yuba

Principal cities and communities:

ReddingChicoOrovilleParadiseYuba CityMarysvilleRed BluffAndersonShasta LakeColusa

Voter registration

Registered voters	Democratic	Republican	Other
573,929	27.8%	43.7%	28.6%

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.