2020Final results
2020 election for Massachusetts's 5th District
U.S. House · Massachusetts
Katherine Clark (D) won with 74.3% of the vote, defeating Caroline Colarusso (R) by 48.7 points.
Katherine ClarkDemocrat · winner
74.3%294,427
Caroline ColarussoRepublican
25.6%101,351
396,183 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Katherine ClarkCaroline Colarusso
$1.8M
Raised by the campaign
$152.3K
$1.5M
Spent by the campaign
$150.6K
$1.3M
Cash on hand
$1.7K
Campaign money: FEC, through Dec 31, 2020.
Source: FEC campaign filingsUpdated Dec 31, 2020