Closest U.S. Senate elections in Massachusetts

The tightest U.S. Senate races Massachusetts has held, ranked by the margin between the top two candidates.

The closest U.S. Senate election in Massachusetts history was in 1920, a margin of 0.84 points. Henry C. Lodge beat William A. Gatson, 414,130 to 406,776. Next closest are 1954 (1.5 points) and 1924 (1.6 points).

Every state is ranked together on Closest U.S. Senate elections in history. For every Senate race Massachusetts has held, special elections included, see the Massachusetts U.S. Senate hub.

What is the closest Senate race in Massachusetts history?

The Massachusetts Senate election decided by the narrowest margin was in 1920, 0.84 points. Henry C. Lodge beat William A. Gatson, 414,130 to 406,776. The next closest were 1954 (1.5 points) and 1924 (1.6 points).

How is the margin measured?

As the gap in vote share between the first and second-place finishers, from the certified general-election count. It is not adjusted for recounts, runoffs or later court rulings; the figure is the result as certified.

Does this include special elections?

No. These are the regular general elections for Massachusetts’s two Senate seats. Special elections to fill a vacancy appear on the Massachusetts Senate hub, which lists every race including specials, and in a few states one of those is closer than anything here.

Why does the list start in 1914?

Because senators were chosen by state legislatures before the Seventeenth Amendment. 1914 is the first cycle of the popular-vote era for the Senate, so it is the first Massachusetts election with a popular margin to measure.

Closest U.S. Senate elections in Massachusetts
#ElectionResultVotesMargin
11920Henry C. Lodge R def. William A. Gatson D414,130 – 406,7760.84 points
21954Leverett Saltonstall R def. Foster Furcolo D956,605 – 927,8991.5 points
31924Frederick H. Gillett R def. David I. Walsh D566,188 – 547,6001.6 points
41952John F. Kennedy D def. Henry Cabot Lodge Jr. R1,211,984 – 1,141,2473.0 points
51918David I. Walsh D def. John W. Weeks R207,478 – 188,2874.6 points
61942Henry Cabot Lodge Jr. R def. Joseph E. Casey D721,239 – 641,0425.8 points
71916Henry C. Lodge R def. John F. Fitzgerald D267,177 – 234,2386.4 points
81948Leverett Saltonstall R def. John F. Fitzgerald D1,088,475 – 954,3986.5 points
91996John Kerry D def. Bill Weld R1,334,135 – 1,143,1207.5 points
102012Elizabeth Ann Warren D def. Scott P. Brown R1,696,346 – 1,458,0487.5 points
111936Henry Cabot Lodge Jr. R def. James M. Curley D875,160 – 739,7517.5 points
121928David I. Walsh D def. Benjamin L. Young R818,055 – 693,5638.2 points
131930Marcus A. Coolidge D def. William M. Butler R651,939 – 539,2269.3 points
141984John Kerry D def. Raymond Shamie R1,393,150 – 1,136,91310.1 points
151978Paul E. Tsongas D def. Edward W. Brooke R1,093,283 – 890,58410.2 points
161960Leverett Saltonstall R def. Thomas J. O'Connor D1,358,556 – 1,050,72512.7 points
171940David I. Walsh D def. Henry Parkman R1,088,838 – 838,12212.8 points
181990John Kerry D def. Jim Rappaport R1,321,712 – 992,91713.6 points
191994Edward M. Kennedy D def. Mitt Romney R1,265,997 – 894,00017.1 points
202024Elizabeth Ann Warren D def. John Deaton R2,041,668 – 1,365,44019.3 points
211946Henry Cabot Lodge Jr. R def. David I. Walsh D989,736 – 660,20019.8 points
221966Edward W. Brooke R def. Endicott Peabody D1,213,473 – 774,76121.9 points
231934David I. Walsh D def. Robert M. Washburn R852,776 – 536,69222.0 points
241982Edward M. Kennedy D def. Raymond Shamie R1,247,084 – 784,60222.6 points
252014Edward J. Markey D def. Brian J. Herr R1,289,944 – 791,95022.8 points

How this ranking is measured

U.S. Senate general elections in Massachusetts, ranked by the smallest gap in vote share between the top two finishers, 1914 to the present, closest 25 shown. Served from the senate_race_margin materialized view. Special elections are excluded, and so is any contest where the top two did not draw at least 1,000 votes between them or where the recorded winner was not the vote leader. The national list of the closest Senate races anywhere applies a 50,000-vote floor, which is why a small early race can appear here and not there.

Compiled by PolitiFinder · published June 14, 2026 · sources: Data & sources · data last verified September 30, 2026.