The 2018 Senate map

33 Senate contests were decided in 2018: Democrats won 21, Republicans 10, independents and others 2. Every contest below links to its page with the state's full Senate history.

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Cycle summary

Wins by party — seats decided this cycle, not the resulting chamber balance.

Contests

33

Democratic wins

21

Republican wins

10

Other wins

2

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Every contest

Statewide totals; candidate-level detail joins when the raw store is re-fetched with names.

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State	Won	Margin	Democratic	Republican	Total
Arizona	D	+2.3%	1,191,100	1,135,200	2,383,742
California	D	+100.0%	11,113,364	0	11,113,364
Connecticut	D	+17.4%	787,685	545,717	1,386,752
Delaware	D	+22.1%	217,385	137,127	362,592
Florida	R	−0.1%	4,089,472	4,099,505	8,188,977
Hawaii	D	+42.3%	276,316	112,035	388,351
Indiana	R	−5.9%	1,023,553	1,158,000	2,282,495
Massachusetts	D	+24.2%	1,633,371	979,210	2,707,090
Maryland	D	+34.6%	1,491,614	697,017	2,297,538
Maine	O	−24.8%	66,268	223,502	634,409
Michigan	D	+6.5%	2,214,478	1,938,818	4,237,253
Minnesota	D	+24.1%	1,566,174	940,437	2,595,948
Missouri	R	−5.8%	1,112,935	1,254,927	2,442,282
Mississippi	R	−19.0%	369,567	547,619	936,215
Montana	D	+3.6%	253,876	235,963	504,384
North Dakota	R	−10.9%	144,376	179,720	324,096
Nebraska	R	−19.1%	269,917	403,151	698,417
New Jersey	D	+11.2%	1,711,654	1,357,355	3,169,310
New Mexico	D	+23.6%	376,998	212,813	697,012
Nevada	D	+5.0%	490,071	441,202	972,132
New York	D	+33.4%	3,755,489	1,730,439	6,055,151
Ohio	D	+6.8%	2,355,923	2,053,963	4,409,886
Pennsylvania	D	+12.9%	2,777,680	2,134,848	4,994,643
Rhode Island	D	+23.2%	231,477	144,421	375,898
Tennessee	R	−10.8%	985,450	1,227,483	2,243,740
Texas	R	−2.6%	4,045,632	4,260,553	8,371,655
Utah	R	−31.7%	328,541	665,215	1,062,845
Virginia	D	+16.0%	1,910,370	1,374,313	3,346,248
Vermont	O	−27.4%	0	74,663	272,330
Washington	D	+16.9%	1,803,364	1,282,804	3,086,168
Wisconsin	D	+10.8%	1,472,914	1,184,885	2,657,799
West Virginia	D	+3.2%	288,808	269,872	582,911
Wyoming	R	−36.9%	61,227	136,210	203,095