2024Final results
2024 election for California's 4th District
U.S. House · California
Mike Thompson (D) won with 66.5% of the vote, defeating John Munn (R) by 32.9 points.
Mike ThompsonDemocrat · winner
66.5%227,321
John MunnRepublican
33.5%114,644
341,965 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 3:26 AM ET
The seat over time
D − R margin in this seat's races around 2024
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 3:26 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Mike ThompsonJohn Munn
$2.4M
Raised by the campaign
$159.8K
$2.9M
Spent by the campaign
$159.8K
$1.2M
Cash on hand
$0
Campaign money: FEC, through Dec 31, 2024.
Source: FEC campaign filingsUpdated Dec 31, 2024