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Election 2020 Results

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2020 US Senate election in Massachusetts

Ed Markey (Democrat) beat Kevin O'Connor (Republican) in Massachusetts in 2020, 66.2% to 33.0%, a margin of 33.1 points and 1,180,044 votes.

The Democratic hold continued from 2014, when Ed Markey also won.

Democrats led in 14 of the 14 counties. The largest, Middlesex, cast 869,347 votes and went to the Democrat by 43.1 points. The closest was Nantucket, where 3,098 votes separated the two parties.

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Early projection, based on early and incomplete polling: the likely matchups, each weighted by the betting markets' odds of both nominations, not a result. Each county is its 2024 presidential margin moved by its state's projected swing; set a national vote and every state, district and county moves by the same amount from our projection. Colours run in 100 steps from a safe Republican to a safe Democratic margin. Boundaries: US Census Bureau.

Senate

CandidatePartyVotesShare
Ed Markey won Democratic 2,357,809 66.2%
Kevin O'Connor Republican 1,177,765 33.0%
All other candidates 28,562 0.8%
Total3,564,136

Every county

CountyDemocratRepublicanOthersTotalMargin
Middlesex 611,485 70.3% 236,655 27.2% 21,207 869,347 D+43.1
Worcester 247,805 57.0% 176,604 40.6% 10,512 434,921 D+16.4
Essex 267,678 63.0% 145,898 34.4% 11,023 424,599 D+28.7
Norfolk 265,210 64.5% 134,433 32.7% 11,399 411,042 D+31.8
Suffolk 266,117 78.9% 59,594 17.7% 11,529 337,240 D+61.2
Plymouth 170,532 56.1% 125,768 41.4% 7,570 303,870 D+14.7
Bristol 155,927 55.4% 115,168 40.9% 10,269 281,364 D+14.5
Hampden 123,867 56.1% 87,995 39.9% 8,931 220,793 D+16.2
Barnstable 89,977 59.4% 58,621 38.7% 2,914 151,512 D+20.7
Hampshire 63,151 71.5% 23,274 26.3% 1,907 88,332 D+45.1
Berkshire 51,261 71.4% 18,185 25.3% 2,325 71,771 D+46.1
Franklin 29,900 69.5% 11,811 27.5% 1,292 43,003 D+42.1
Dukes 9,767 75.9% 2,859 22.2% 247 12,873 D+53.7
Nantucket 5,132 69.9% 2,034 27.7% 172 7,338 D+42.2

Margin: the Democrat's share of all votes minus the Republican's. Sources and how the results were checked.

Massachusetts Senate elections we hold

YearWinnerMargin
2024 Elizabeth Warren (D) D+19.8
2020 Ed Markey (D) D+33.1
2018 Elizabeth A. Warren (D) D+24.2
2014 Ed Markey (D) D+23.9
2012 Elizabeth Warren (D) D+7.5
2008 John Kerry (D) D+34.9
2006 Ted Kennedy (D) D+38.8
2002 John Kerry (D) D+80.0
2000 Ted Kennedy (D) D+56.9
1996 John F. Kerry (D) D+7.5
1994 Edward M. Kennedy (D) D+17.1
1990 John Kerry (D) D+14.2
1988 Edward M. Kennedy (D) D+31.0
1984 John F. Kerry (D) D+10.1
1982 Edward M. Kennedy (D) D+22.6
1978 Paul E. Tsongas (D) D+10.2
1976 Edward M. Kennedy (D) D+40.3
1972 Edward Brooke (R) R+28.8
1970 Ted Kennedy (D) D+25.2
1966 Edward Brooke (R) R+21.9
1964 Ted Kennedy (D) D+48.8
1960 Leverett Saltonstall (R) R+12.7
1958 John F. Kennedy (D) D+47.0
1954 Leverett Saltonstall (R) R+1.5
1952 John F. Kennedy (D) D+3.0
1948 Leverett Saltonstall (R) R+6.5
1946 Henry Cabot Lodge Jr. (R) R+19.8
1942 Henry Cabot Lodge Jr. (R) R+5.8
1940 David I. Walsh (D) D+12.8
1936 Henry Cabot Lodge Jr. (R) R+7.5
1934 David I. Walsh (D) D+22.0
1930 Marcus A. Coolidge (D) D+9.3
1928 David I. Walsh (D) D+8.2
1924 Frederick H. Gillett (R) R+1.7
1922 Henry Cabot Lodge (R) R+0.8
1918 David I. Walsh (D) D+4.6
1916 Henry Cabot Lodge (R) R+6.4