508 state legislative seats changed party control in the 2018 general elections
Partisan control of 508 state legislative seats changed as a result of the 2018 general elections. That accounts for 8.4% of the 6,073 seats that were up for election in 87 of the 99 chambers. Of the 508 seats that changed party control, 391—77.0% of the total —were Republican seats that flipped to Democrats and 93—18.2%—were Democratic seats that flipped to Republicans.
At least one seat changed party control in every state that held regularly-scheduled state legislative elections. New Hampshire had the most seats change control, 77, followed by Maine with 26 and Pennsylvania, which had 22. The map below shows the number of state legislative seats that changed party control by state in the November 2018 elections.

Democrats saw a net gain of 308 seats as a result of the November elections, while Republicans lost a net number of 294 seats. Third party and independent legislators lost a net of 14 seats.
Control of six state legislative chambers flipped to Democrats, including both chambers of New Hampshire's General Court, the state senates of Colorado, Maine, and New York, and the Minnesota House of Representatives.
Democrats had a net gain of state legislative seats in 35 states and Republicans a net gain in four. In six states—Arkansas, Kansas, Missouri, South Carolina, South Dakota, and Wisconsin—the two major parties gained the same number of state legislative seats.
Additionally, 15 state legislative seats changed party control during special elections in 2018. Eleven were Republican seats won by Democrats while the remaining four were Democratic seats won by Republicans. Six of the Republican-held seats that flipped to Democrats in special elections flipped back to Republicans in November.
Currently, Republicans control 52.3% of all state legislative seats, while Democrats hold 47.0 percent. Republicans have a majority in 61 chambers, Democrats hold the majority in 37 chambers, and the Alaska House of Representatives is operating under a shared power agreement.
|