2012Final results
2012 election for Washington's 1st District
U.S. House · Washington
Suzan DelBene (D) won with 53.9% of the vote, defeating John Koster (R) by 7.9 points.
Suzan DelBeneDemocrat · winner
53.9%177,025
John KosterRepublican
46.1%151,187
328,212 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 2012
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.
Suzan DelBeneJohn Koster
$4.4M
Raised by the campaign
$1.2M
$4.5M
Spent by the campaign
$1.2M
$6.2K
Cash on hand
$23.5K
Campaign money: FEC, through Dec 31, 2012.
Source: FEC campaign filingsUpdated Dec 31, 2012