| Election Name: | 2020 Massachusetts House of Representatives election [1] |
| Registered: | 4,812,909 [2] (5.20 pp) |
| Turnout: | 76.00% (15.84 pp) |
| Speaker | |
| Before Election: | Robert DeLeo |
| Before Party: | Massachusetts Democratic Party |
| After Election: | Ronald Mariano |
| After Party: | Massachusetts Democratic Party |
| Country: | Massachusetts |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2018 Massachusetts House of Representatives election |
| Previous Year: | 2018 |
| Next Election: | 2022 Massachusetts House of Representatives election |
| Next Year: | 2022 |
| Seats For Election: | All 160 seats in the Massachusetts House of Representatives |
| Majority Seats: | 81 |
| Election Date: | November 3, 2020 |
| Leader1: | Robert DeLeo |
| Party1: | Democratic Party (United States) |
| Leader Since1: | January 27, 2009 |
| Leaders Seat1: | 19th Suffolk |
| Last Election1: | 127 seats |
| Seats1: | 129 |
| Seat Change1: | 2 |
| Popular Vote1: | 2,239,316 |
| Percentage1: | 74.27% |
| Leader2: | Bradley Jones Jr. |
| Party2: | Republican Party (United States) |
| Leader Since2: | November 21, 2002 |
| Leaders Seat2: | 20th Middlesex |
| Last Election2: | 32 seats |
| Seats2: | 30 |
| Seat Change2: | 2 |
| Popular Vote2: | 686,101 |
| Percentage2: | 22.76% |
| Leader4: | Susannah Whipps |
| Party4: | Independent (United States) |
| Leaders Seat4: | 2nd Franklin |
| Last Election4: | 1 seat |
| Seats4: | 1 |
| Popular Vote4: | 56,261 |
| Percentage4: | 1.87% |
The 2020 Massachusetts House of Representatives election took place on November 3, 2020. It elected members of the Massachusetts House of Representatives.[3] Democrats achieved a net gain of 2 seats. One independent, Susannah Whipps, was also elected.[4] Incumbent Speaker Robert DeLeo won re-election but resigned before the new session to take a position at Northeastern University; Ronald Mariano replaced him as Speaker.[5]
| Party | Votes | Percentage | Seats | +/– | ||
|---|---|---|---|---|---|---|
| Democratic | 2,239,316 | 74.27 | 129 | 2 | ||
| Republican | 686,101 | 22.76 | 30 | 2 | ||
| Green-Rainbow | 1,100 | 0.04 | 0 | |||
| Independents | 56,261 | 1.87 | 1 | |||
| All Others | 30,628 | 1.02 | 0 | |||
| Write-In | 1,613 | 0.05 | 0 | |||
| Valid votes | 3,015,019 | 82.42 | — | — | ||
| Invalid votes | 642,986 | 17.58 | — | — | ||
| Totals | 3,658,005 | 100 | 160 | — | ||
| Registered voter/turnout | 4,812,909 | 76.00 | ||||
Seats where the margin of victory was under 10%:
https://malegislature.gov/Legislators/Leadership/House