2012Final results
2012 election for California Assembly District 12
California State Assembly · California
Kristin Olsen (R) won with 60.6% of the vote, defeating Christopher Mateo (D) by 21.1 points.
Kristin OlsenRepublican · winner · incumbent
60.6%89,821
Christopher MateoDemocrat
39.4%58,517
148,338 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