2017 United States state legislative elections

All seats of the New Jersey General Assembly were up for election to two-year terms in coterminous two-member districts. The New Jersey Senate held elections for four-year terms. Democrats maintained majority control of both houses with expanded majorities.

Parties		Candidates	Seats				Popular Vote
			2015	2017	+/-	Strength	Vote	%	Change
	Democratic	80	52	54	2	68%	2,266,879	58.1%	4.8%
	Republican	78	28	26	2	33%	1,613,865	41.4%	4.5%
	Green	4	0	0		0%	4,828	0.1%	0.3%
	Libertarian	4	0	0		0%	2,804	0.1%	0.0%
	Solidarity	1	0	0		0%	821	0.02%	N/A
	Independent	14	0	0		0%	13,537	0.3%	0.0%
Total		181	80	80	0	100.0%	3,902,734	100.0%	-

Summary of the November 7, 2017, New Jersey State Senate election results

Parties		Seats				Popular vote
		2013	2017	+/−	Strength	Vote	%	Change
	Democratic Party	24	25	1	62.50%	1,185,420	59.5%	+12.1%
	Republican Party	16	15	1	37.50%	802,418	40.3%	−11.8%
	Green Party	-	-	-	-	1,306	0.1%	-
	Libertarian Party	-	-	-	-	574	<0.1%	−0.1%
	Independent	-	-	-	-	2,545	0.1%	−0.4%
Totals		40	40	0	100.0%	1,992,263	100.0%	-
Source: Election Statistics – New Jersey Secretary of State (note: does not include blank, write-in and over/under votes)

All seats of the Virginia House of Delegates were up for election in single-member districts. Delegates serve terms of two years. Democrats gained 15 seats and fell one seat short of a majority.

  Republican (51)

  Democratic (49)

Party		Leader	Delegates				Votes
				Of total		±		Of total		±
Republican Party		William J. Howell	51	51.00%	51 / 100	15	1,076,081	43.81%		15.79
Democratic Party		David Toscano	49	49.00%	49 / 100	15	1,304,241	53.10%		17.35
Other parties
Write-in		N/A	0	0.00%	0 / 100		36,640	1.49%
Independent		N/A	0	0.00%	0 / 100		26,603	1.08%
Green Party		N/A	0	0.00%	0 / 100		6,409	0.26%		0.08
Libertarian Party		N/A	0	0%	0 / 100		6,295	0.25%		0.13

• Delaware's 10th state senate district special election, 2017: A February 25th special election for the Delaware Senate seat left vacant by Bethany Hall-Long when she became the state's lieutenant governor was won by Democrat Stephanie Hansen.

• The Florida Senate seat formerly held by Frank Artiles, who had resigned after using racial slurs to describe fellow legislators. The seat was won by Annette Taddeo with 51% of the vote.[2]

• An April 18 special election[3] for the Georgia Senate seat left vacated by Judson Hill[4] when he decided to run for US Congress 6th district seat vacated by Tom Price who was appointed Health and Human Services Secretary. Democratic candidate Christine Triebsch[5] and Republican Candidate Kay Kirkpatrick[6] ran for the vacated Georgia State Senate seat, which was won by Kirkpatrick.
• Democrats also picked up two seats previously held by Republicans in the Georgia House of Representatives, as well as advancing two candidates to a runoff election for a Georgia State Senate seat formerly held by a Republican.[7]

• Republicans picked up a total of one seat, in the Louisiana House of Representatives where Republican John Stefanski won a special election to the seat vacated by Democratic incumbent Jack Montoucet, who resigned to be appointed Secretary of the Louisiana Department of Wildlife and Fisheries by Governor John Bel Edwards.[8]

• Democrats won two seats in the New Hampshire House of Representatives.[9]
• Then another seat New Hampshire House of Representatives changed to Democratic control on September 26th, 2017.[10]
• On October 24 a special election was held in Strafford 13 in the New Hampshire House of Representatives.[11] Casey Conley, a Democrat, won comfortably.[12]
• On November 7th, Democrats won a fourth seat in the New Hampshire House of Representatives with Democratic Erika Connors winning an election to fill a vacancy for the Hillsborough 15 district caused by the death of Republican Rep. Steve Vaillancourt.[13]

• There was a special election in the heavily Republican New York Assembly District 9 on May 23, which was won by Democrat Christine Pellegrino 58–42. Trump had won the district with 60% of the vote.[14]

• Democrats flipped two seats in the Oklahoma House of Representatives, and one seat in the Oklahoma Senate.[15]
• On November 14, Democrat Allison Ikley-Freeman won an Oklahoma Senate special election in the previously Republican-held 37th district by 31 votes.[16]

• On November 7, several states held special elections. There was a special election to fill the Washington State Senate seat for the Washington's 45th legislative district. Since the State Senate was evenly split going into the election, the contest election determined the partisan balance of power in Washington.[17] Democrat Manka Dhingra won a majority of votes in the first round of the election, but rules required the race to go to a second round regardless.[18] In the second round, with over $9,000,000 spent on the election through campaign contributions and political action committee expenditures, with a small number of votes yet to be counted, Dhingra led by over a 10% margin. Anticipating the Dhingra victory, Democratic Senate Minority Leader Sharon Nelson described a comprehensive agenda for the 60-day legislative session beginning in January that included voting rights reform and campaign-finance disclosure revision, as well as women's reproductive health, clean energy and firearms safety measures.[19] Dhingra won the second round.