On Nov. 3, 2020, 5,875 state legislative seats were up for regularly scheduled elections across 86 of the nation’s 99 state legislative chambers. As a result of the election, control of 315 seats flipped from one party to another.
Republicans gained a net 141 seats, Democrats lost a net 133 seats, and independent and third party candidates lost a net eight seats. At least one seat flipped parties in every state holding regularly scheduled state legislative elections except Hawaii.
Of the 315 seats that changed party control, 215 (68.3%) were Democratic seats that went to Republicans. Seventy-eight (24.8%) were Republican seats that went to Democrats.
The table below shows the total number of state legislative seats that flipped partisan control during the 2020 state legislative elections. Columns show the number of seats that flipped to the given partisan affiliation listed in the top row. Rows show the number of seats that flipped from the given partisan affiliation listed in the leftmost column.
There was a 38% decrease in flipped state legislative seats compared to 2018, which saw 508 flips. Democrats flipped 80% fewer seats from Republicans in 2020 compared to 2018. Republicans saw a 131.2% increase in flipped Democratic seats. The table below shows the total number of flipped seats in both years and the number of seats flipped between major parties.
Fifty seats flipped party control in New Hampshire, the most of any state. Forty-nine of those seats flipped to Republicans—48 from Democrats and one from a Libertarian. One seat flipped from Republican to Democrat. As a result, both chambers of the New Hampshire General Court changed from Democratic to Republican control.
The map below shows states shaded to reflect the number of seats that changed party control in 2020. Darker shades indicate a larger number of flips. States shown in gray did not hold regularly scheduled state legislative elections in 2020.
To see more analysis and the full list of state legislative seats that flipped partisan control following the 2020 elections: Election results, 2020: State legislative seats that changed party control, Overview