2016Final results
2016 election for Massachusetts's 4th District
U.S. House · Massachusetts
Joseph P. Kennedy III (D) won with 70.1% of the vote, defeating David A. Rosa (R) by 40.3 points.
Joseph P. Kennedy IIIDemocrat · winner
70.1%265,823
David A. RosaRepublican
29.8%113,055
379,213 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 2016
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 IIIDavid A. Rosa
$3.1M
Raised by the campaign
$18.6K
$1.8M
Spent by the campaign
$18.6K
$2.8M
Cash on hand
$1
Campaign money: FEC, through Dec 31, 2016.
Source: FEC campaign filingsUpdated Dec 31, 2016