2024Final results
2024 election for California's 10th District
U.S. House · California
Mark DeSaulnier (D) won with 66.5% of the vote, defeating Katherine Piccinini (R) by 33.0 points.
Mark DeSaulnierDemocrat · winner
66.5%241,926
Katherine PiccininiRepublican
33.5%121,826
363,752 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.
Mark DeSaulnierKatherine Piccinini
$665K
Raised by the campaign
$40.7K
$611.4K
Spent by the campaign
$38.7K
$629K
Cash on hand
$2.1K
Campaign money: FEC, through Dec 31, 2024.
Source: FEC campaign filingsUpdated Dec 31, 2024