1980Final results
1980 election for California's 18th District
U.S. House · California
William Thomas (R) won with 71.0% of the vote, defeating Mary "pat" Timmermans (D) by 42.1 points.
William ThomasRepublican · winner
71.0%126,046
Mary "pat" TimmermansDemocrat
29.0%51,415
177,461 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 1980
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Mary "pat" TimmermansWilliam Thomas
$19.4K
Raised by the campaign
$246.2K
$12.9K
Spent by the campaign
$192.1K
$0
Cash on hand
$0
Campaign money: FEC, through Dec 31, 1980.
Source: FEC campaign filingsUpdated Dec 31, 1980