1984Final results
1984 election for California Senate District 25
California State Senate · California
H. L. Richardson (R) won with 66.7% of the vote, defeating Diana Monaghan (D) by 33.3 points.
H. L. RichardsonRepublican · winner · incumbent
66.7%168,257
Diana MonaghanDemocrat
33.3%84,188
252,445 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 1984
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET