2010Final results
2010 election for U.S. Senate in California
U.S. Senate · California
Barbara Boxer (D) won with 52.2% of the vote, defeating Carly Fiorina (R) by 10.0 points.
Barbara BoxerDemocrat · winner
52.2%5,218,441
Carly FiorinaRepublican
42.2%4,217,366
Gail K. LightfootLibertarian
1.8%175,242
Marsha FeinlandPeace and Freedom
1.4%135,093
Duane RobertsGreen
1.3%128,510
Edward C. NoonanAmerican Independent
1.3%125,441
10,000,160 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 2010
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.
Barbara BoxerCarly Fiorina
$13M
Raised by the campaign
$22.7M
$6M
Spent by the campaign
$22.6M
$603.2K
Cash on hand
$0
Campaign money: FEC, through Dec 31, 2010.
Source: FEC campaign filingsUpdated Dec 31, 2010
The candidates
Barbara Boxer (D)Carly Fiorina (R)
Also on the ballot: Gail K. Lightfoot (Libertarian), 1.8%; Marsha Feinland (Peace and Freedom), 1.4%; Duane Roberts (Green), 1.3%; Edward C. Noonan (American Independent), 1.3%