May 2021 partisan composition of state legislative seats: 54.3% Republicans, 44.9% Democrats

Ballotpedia’s May partisan count of state legislative seats found that 54.30% of state legislators are Republicans and 44.93% are Democrats.

At the end of every month, Ballotpedia tallies the partisan balance of state legislatures, which refers to which political party holds a majority of seats in each chamber. Republicans currently control 61 chambers, while Democrats control 37. One chamber, the Alaska House of Representatives, has a power-sharing agreement between the two parties.

At the end of May, Republicans held 1,091 of the 1,972 total state senate seats, while Democrats held 867. The Democrats lost two seats since April, while the Republicans’ number of seats stayed the same. Democrats also held 2,450 of the 5,411 total state House seats (up one from last month), while Republicans controlled 2,918 (also up one). Third-party or independent officeholders held 38 seats, and there were 19 vacancies.

In May, Democrats had a net loss of one seat, while Republicans had a net gain of one. Compared to May 2020, Democrats have lost 142 state legislative seats, while Republicans have gained 153 seats. 

Additional reading: