2012Final results
2012 election for Massachusetts's 4th District
U.S. House · Massachusetts
Joseph P. Kennedy III (D) won with 61.1% of the vote, defeating Sean Bielat (R) by 25.2 points.
Joseph P. Kennedy IIIDemocrat · winner
61.1%221,303
Sean BielatRepublican
35.9%129,936
David A. RosaIndependent
3.0%10,741
362,245 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.
Joseph P. Kennedy IIISean Bielat
$4.2M
Raised by the campaign
$1.1M
$3.9M
Spent by the campaign
$1.1M
$334.8K
Cash on hand
$13.5K
Campaign money: FEC, through Dec 31, 2012.
Source: FEC campaign filingsUpdated Dec 31, 2012