2004Final results
2004 election for California's 20th District
U.S. House · California
Jim Costa (D) won with 53.4% of the vote, defeating Roy Ashburn (R) by 6.8 points.
Jim CostaDemocrat · winner
53.4%61,005
Roy AshburnRepublican
46.6%53,231
114,236 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 2004
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.
Jim CostaRoy Ashburn
$2M
Raised by the campaign
$1.1M
$1.9M
Spent by the campaign
$1.1M
$26.2K
Cash on hand
$30.8K
Campaign money: FEC, through Dec 31, 2004.
Source: FEC campaign filingsUpdated Dec 31, 2004