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1876–2024
Elections / 1978 · US Senate

The 1978 Senate map

33 Senate contests were decided in 1978: Democrats won 15, Republicans 18. Every contest below links to its page with the state's full Senate history.

1978 US Senate elections
1978 Senate margin by stateA map of the United States with each state filled by its 1978 result — deep red (Republican) through neutral to deep blue (Democratic), and gold where an independent or third-party candidate carried the state.Alabama · D+94.0Alaska · R+51.7Arizona · —Colorado · R+18.4Florida · —Georgia · D+66.3Indiana · —Kansas · R+11.5Maine · R+22.7Massachusetts · D+10.2Minnesota · R+16.2New Jersey · D+12.2North Carolina · R+9.0North Dakota · —Oklahoma · D+32.6Pennsylvania · —South Dakota · R+33.7Texas · R+0.5Wyoming · D+24.3Connecticut · —Missouri · —West Virginia · D+1.0Illinois · R+7.9New Mexico · R+6.8Arkansas · D+60.2California · —Delaware · D+16.9District of Columbia · —Hawaii · —Iowa · R+3.2Kentucky · D+24.1Maryland · —Michigan · D+4.3Mississippi · R+13.5Montana · D+11.4New Hampshire · R+2.2New York · —Ohio · —Oregon · R+23.4Tennessee · R+15.2Utah · —Virginia · R+0.4Washington · —Wisconsin · —Nebraska · D+35.3South Carolina · R+11.4Idaho · R+36.9Nevada · —Vermont · —Louisiana · D+100.0Rhode Island · D+50.2
1978Senate margin
D+60
R+60
States with a Senate contest in 1978, each filled by its result. States without a seat up this cycle are faint.
Smaller states, enlarged
NHR+2.2MAD+10.2RID+50.2NJD+12.2DED+16.9
Blue and red show the Democratic-vs-Republican margin; gold marks a seat an independent won (e.g. Vermont or Maine). Where a state ran two contests in one year, the map shows the regular-cycle result.
Cycle summary
Wins by party — seats decided this cycle, not the resulting chamber balance.
Contests
33
Democratic wins
15
Republican wins
18
Democratic 1515Republican 1818
Every contest
Statewide totals; candidate-level detail joins when the raw store is re-fetched with names.
StateWonMarginDemocraticRepublicanTotal
AlaskaR
−51.7%
29,57492,783122,357
AlabamaD
+94.0%
547,0540582,005
ArkansasD
+60.2%
395,50684,308517,025
ColoradoR
−18.4%
330,148480,801819,256
DelawareD
+16.9%
93,93066,479162,072
GeorgiaD
+66.3%
536,320108,808645,128
IowaR
−3.2%
395,066421,598824,576
IdahoR
−36.9%
89,635194,412284,047
IllinoisR
−7.9%
1,448,1871,698,7113,184,605
KansasR
−11.5%
317,602403,354748,839
KentuckyD
+24.1%
290,730175,766476,740
LouisianaD
+100.0%
101
MassachusettsD
+10.2%
1,093,283890,5841,985,700
MaineR
−22.7%
127,327212,294375,114
MichiganD
+4.3%
1,484,1931,362,1652,846,630
MinnesotaR
−16.2%
638,375894,0921,580,550
MississippiR
−13.5%
187,541267,302590,236
MontanaD
+11.4%
160,353127,589287,942
North CarolinaR
−9.0%
516,663619,1511,135,814
NebraskaD
+35.3%
334,096159,706493,802
New HampshireR
−2.2%
127,945133,745263,760
New JerseyD
+12.2%
1,082,960844,2001,957,515
New MexicoR
−6.8%
160,045183,442343,487
OklahomaD
+32.6%
493,953247,857754,264
OregonR
−23.4%
341,616550,165891,781
Rhode IslandD
+50.2%
229,55776,061305,618
South CarolinaR
−11.4%
280,146351,917632,063
South DakotaR
−33.7%
84,767170,832255,599
TennesseeR
−15.2%
466,228642,6441,157,023
TexasR
−0.5%
1,139,1491,151,3762,312,540
VirginiaR
−0.4%
608,511613,2321,221,743
West VirginiaD
+1.0%
249,034244,317493,351
WyomingD
+24.3%
82,90850,456133,364