The 1980 Senate map

33 Senate contests were decided in 1980: Democrats won 13, Republicans 20. 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

13

Republican wins

20

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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	−7.8%	72,007	84,159	156,166
Alabama	R	−2.9%	613,148	650,362	1,296,757
Arkansas	D	+18.2%	477,905	330,576	808,481
Arizona	R	−1.1%	422,972	432,371	874,225
California	D	+19.4%	4,704,098	3,091,671	8,324,012
Colorado	D	+1.6%	590,501	571,295	1,173,142
Connecticut	D	+13.4%	763,969	581,884	1,355,961
Florida	R	−3.3%	1,705,409	1,822,460	3,527,869
Georgia	R	−1.7%	776,143	803,686	1,579,829
Hawaii	D	+59.5%	224,485	53,068	288,006
Iowa	R	−7.9%	581,545	683,014	1,276,986
Idaho	R	−1.0%	214,439	218,701	439,647
Illinois	D	+13.5%	2,565,302	1,946,296	4,579,933
Indiana	R	−7.6%	1,015,962	1,182,414	2,198,376
Kansas	R	−27.5%	340,271	598,686	938,957
Kentucky	D	+30.3%	720,891	386,029	1,106,920
Louisiana	D	+93.5%	810,692	23,947	841,013
Maryland	R	−32.3%	435,118	850,970	1,286,088
Missouri	D	+4.3%	1,074,859	985,399	2,066,965
North Carolina	R	−0.6%	887,653	898,064	1,797,665
New Hampshire	R	−4.3%	179,455	195,559	375,014
Nevada	R	−21.4%	92,129	144,224	243,273
New York	D	+5.8%	2,618,661	2,272,082	6,014,841
Ohio	D	+41.0%	2,770,786	1,137,695	3,984,893
Oklahoma	R	−9.9%	478,283	587,252	1,098,294
Oregon	R	−8.1%	501,963	594,290	1,139,939
Pennsylvania	R	−2.4%	2,122,391	2,230,404	4,418,042
South Carolina	D	+40.7%	612,554	257,946	870,500
South Dakota	R	−18.8%	129,018	190,594	327,478
Utah	R	−48.2%	151,454	437,675	594,298
Vermont	D	+1.3%	104,176	101,421	209,002
Washington	R	−8.3%	792,052	936,317	1,728,369
Wisconsin	R	−1.9%	1,065,487	1,106,311	2,204,135