The 1988 Senate map

33 Senate contests were decided in 1988: Democrats won 19, Republicans 14. 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

19

Republican wins

14

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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	+15.7%	660,403	478,060	1,164,507
California	R	−8.8%	4,287,253	5,143,409	9,743,547
Connecticut	D	+0.7%	688,499	678,454	1,383,516
Delaware	R	−24.1%	92,378	151,115	243,493
Florida	R	−0.8%	2,016,553	2,051,071	4,067,624
Hawaii	D	+55.9%	247,941	66,987	323,876
Indiana	R	−36.3%	668,778	1,430,525	2,099,303
Massachusetts	D	+31.0%	1,693,344	884,267	2,606,225
Maryland	D	+23.6%	999,166	617,537	1,616,703
Maine	D	+62.6%	452,581	104,164	556,745
Michigan	D	+21.9%	2,116,865	1,348,219	3,505,985
Minnesota	R	−15.3%	856,694	1,176,210	2,093,538
Missouri	R	−36.0%	660,045	1,407,416	2,078,871
Mississippi	R	−7.8%	436,339	510,380	946,719
Montana	R	−3.7%	175,809	189,445	365,254
North Dakota	D	+20.4%	171,899	112,937	289,170
Nebraska	D	+15.1%	378,717	278,250	667,339
New Jersey	D	+8.4%	1,599,905	1,349,937	2,987,634
New Mexico	D	+26.6%	321,983	186,579	508,562
Nevada	D	+4.2%	175,548	161,336	342,407
New York	D	+36.8%	3,907,178	1,686,558	6,040,980
Ohio	D	+14.0%	2,480,038	1,872,716	4,352,754
Pennsylvania	R	−34.0%	1,416,764	2,901,715	4,366,598
Rhode Island	R	−9.2%	180,717	217,273	397,990
Tennessee	D	+30.6%	1,020,061	541,033	1,567,136
Texas	D	+19.2%	3,149,806	2,129,228	5,323,023
Utah	R	−35.4%	203,364	430,089	640,702
Virginia	D	+42.6%	1,474,086	593,652	2,067,738
Vermont	R	−38.2%	71,460	163,183	240,108
Washington	R	−2.2%	904,183	944,359	1,848,542
Wisconsin	D	+4.5%	1,128,625	1,030,440	2,168,190
West Virginia	D	+29.5%	410,983	223,564	634,547
Wyoming	R	−0.7%	89,821	91,143	180,964