2012Final results
2012 election for California Senate District 23
California State Senate · California
Bill Emmerson (R) won with 56.3% of the vote, defeating Melissa Odonnell (D) by 12.6 points.
Bill EmmersonRepublican · winner
56.3%159,045
Melissa OdonnellDemocrat
43.7%123,518
282,563 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 2012
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET