2018Final results
2018 election for California's 42nd District
U.S. House · California
Ken Calvert (R) won with 56.5% of the vote, defeating Julia C. Peacock (D) by 13.0 points.
Ken CalvertRepublican · winner
56.5%131,040
Julia C. PeacockDemocrat
43.5%100,892
231,932 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Julia C. PeacockKen Calvert
$159K
Raised by the campaign
$1.6M
$149.9K
Spent by the campaign
$1.6M
$9.5K
Cash on hand
$517.9K
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018