2018 State Election Analysis
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Updated 4:00pm EST, December 26, 2018

This content is part of Ballotpedia's analysis of the 2018 midterm elections. For comprehensive election results,click here.

Democrats had a net gain of 308 seats in the87 state legislative chambers that held regularly-scheduled elections onNovember 6, 2018.Republicans lost 294 seats in the elections, and third-party and independent candidates lost 14 seats.

Democrats gained 65 state senate seats. Republicans lost 60 Senate seats, and third-party and independent candidates lost five.

Democrats gained 243 state house seats. Republicans lost 234 state house seats, and third-party and independent candidates lost nine.

The charts below show the total changes in state legislative seats, state senate seats, and state house seats, respectively.

Change in state legislative partisan composition, 2018 elections
Total	Before	After	Net
Democrats	2,815	3,123	+308
Republicans	3,757	3,463	-294
Other/3rd parties	38	24	-14
Total	6,561	6,561	--

Change in state senate partisan composition, 2018 elections
Total	Before	After	Net
Democrats	651	716	+65
Republicans	947	887	-60
Other/3rd parties	8	3	-5
Total	1,606	1,606	--

Change in state house partisan composition, 2018 elections
Total	Before	After	Net
Democrats	2,164	2,407	+243
Republicans	2,810	2,576	-234
Other/3rd parties	30	21	-9
Total	5,004	5,004	--

Flipped seats

See also:State legislative seats that changed party control, 2018

The map below contains a state-by-state breakdown of state legislative seats that changed party control in the November 2018 elections. Hover over a state to view how many seats each party flipped.

Visitthis page to see the chambers that changed partisan control in the 2018 elections:2018 election analysis: Partisan balance of state legislative chambers

Visit the following pages to see where Democrats and Republicans gained and lost seats in 2018:

• State legislative chambers where Democrats lost seats, 2018
• State legislative chambers where Democrats gained seats, 2018
• State legislative chambers where Republicans gained seats, 2018
• State legislative chambers where Republicans lost seats, 2018

See also

• 2018 election analysis: State government trifectas
• 2018 election analysis: Partisan balance of state legislative chambers
• 2018 election analysis: Incumbents defeated in state legislative elections
• 2018 election analysis: Partisan balance of governors
• 2018 election analysis: State government triplexes
• 2018 election analysis: Control of the U.S. House
• 2018 election analysis: Control of the U.S. Senate
• 2018 election analysis: Was 2018 a wave election?

Footnotes