The 2016 Senate map

34 Senate contests were decided in 2016: Democrats won 12, Republicans 22. 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

34

Democratic wins

12

Republican wins

22

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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
Alaska	R	−32.8%	36,200	138,149	310,735
Alabama	R	−28.1%	748,709	1,335,104	2,083,813
Arkansas	R	−23.6%	400,602	661,984	1,106,452
Arizona	R	−13.0%	1,031,245	1,359,761	2,529,768
California	D	+100.0%	12,244,170	0	12,244,170
Colorado	D	+5.7%	1,370,710	1,215,318	2,743,023
Connecticut	D	+23.1%	920,766	552,621	1,596,238
Florida	R	−7.7%	4,122,088	4,835,191	9,301,716
Georgia	R	−13.8%	1,599,726	2,135,806	3,897,792
Hawaii	D	+51.4%	306,604	92,653	416,562
Iowa	R	−24.5%	549,460	926,007	1,539,351
Idaho	R	−38.4%	188,249	449,017	678,943
Illinois	D	+15.1%	3,012,940	2,184,692	5,491,239
Indiana	R	−9.7%	1,158,947	1,423,991	2,732,419
Kansas	R	−29.9%	379,740	732,376	1,177,876
Kentucky	R	−14.5%	813,246	1,090,177	1,903,423
Louisiana	R	−26.7%	705,271	1,239,489	1,997,218
Maryland	D	+25.2%	1,659,907	972,557	2,722,434
Missouri	R	−2.8%	1,300,200	1,378,458	2,802,547
North Carolina	R	−5.7%	2,128,165	2,395,376	4,691,133
North Dakota	R	−61.6%	58,116	268,788	342,135
New Hampshire	D	+0.1%	354,649	353,632	739,140
Nevada	D	+2.4%	521,994	495,079	1,108,294
New York	D	+41.4%	4,784,220	1,723,927	7,396,308
Ohio	R	−20.9%	1,996,908	3,118,567	5,374,053
Oklahoma	R	−43.2%	355,911	980,892	1,448,047
Oregon	D	+23.3%	1,105,119	651,106	1,952,478
Pennsylvania	R	−1.4%	2,865,012	2,951,702	6,051,856
South Carolina	R	−26.2%	704,540	1,241,609	2,048,036
South Dakota	R	−43.7%	104,140	265,516	369,656
Utah	R	−41.1%	301,858	760,220	1,115,583
Vermont	D	+28.3%	192,243	103,637	313,500
Washington	D	+18.0%	1,913,979	1,329,338	3,243,317
Wisconsin	R	−3.4%	1,380,335	1,479,471	2,948,733