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1876–2024
Elections / 2018 · US Senate

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.

2018 US Senate elections
2018 Senate margin by stateA map of the United States with each state filled by its 2018 result — deep red (Republican) through neutral to deep blue (Democratic), and gold where an independent or third-party candidate carried the state.Alabama · —Alaska · —Arizona · D+2.3Colorado · —Florida · R+0.1Georgia · —Indiana · R+5.9Kansas · —Maine · O+19.1Massachusetts · D+24.2Minnesota · D+24.1New Jersey · D+11.2North Carolina · —North Dakota · R+10.9Oklahoma · —Pennsylvania · D+12.9South Dakota · —Texas · R+2.6Wyoming · R+36.9Connecticut · D+17.4Missouri · R+5.8West Virginia · D+3.2Illinois · —New Mexico · D+23.6Arkansas · —California · D+100.0Delaware · D+22.1District of Columbia · —Hawaii · D+42.3Iowa · —Kentucky · —Maryland · D+34.6Michigan · D+6.5Mississippi · R+19.0Montana · D+3.6New Hampshire · —New York · D+33.4Ohio · D+6.8Oregon · —Tennessee · R+10.8Utah · R+31.7Virginia · D+16.0Washington · D+16.9Wisconsin · D+10.8Nebraska · R+19.1South Carolina · —Idaho · —Nevada · D+5.0Vermont · O+45.2Louisiana · —Rhode Island · D+23.2
2018Senate margin
D+60
R+60
States with a Senate contest in 2018, each filled by its result. States without a seat up this cycle are faint.
Gold marks a state an independent or third-party candidate carried — the blue/red ramp is the Democratic-vs-Republican margin only where a major party won.
Smaller states, enlarged
VTO+45.2MAD+24.2RID+23.2CTD+17.4NJD+11.2DED+22.1MDD+34.6
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
21
Republican wins
10
Other wins
2
Democratic 2121Republican 1010Other 22
Every contest
Statewide totals; candidate-level detail joins when the raw store is re-fetched with names.
StateWonMarginDemocraticRepublicanTotal
ArizonaD
+2.3%
1,191,1001,135,2002,383,742
CaliforniaD
+100.0%
11,113,364011,113,364
ConnecticutD
+17.4%
787,685545,7171,386,752
DelawareD
+22.1%
217,385137,127362,592
FloridaR
−0.1%
4,089,4724,099,5058,188,977
HawaiiD
+42.3%
276,316112,035388,351
IndianaR
−5.9%
1,023,5531,158,0002,282,495
MassachusettsD
+24.2%
1,633,371979,2102,707,090
MarylandD
+34.6%
1,491,614697,0172,297,538
MaineO
−24.8%
66,268223,502634,409
MichiganD
+6.5%
2,214,4781,938,8184,237,253
MinnesotaD
+24.1%
1,566,174940,4372,595,948
MissouriR
−5.8%
1,112,9351,254,9272,442,282
MississippiR
−19.0%
369,567547,619936,215
MontanaD
+3.6%
253,876235,963504,384
North DakotaR
−10.9%
144,376179,720324,096
NebraskaR
−19.1%
269,917403,151698,417
New JerseyD
+11.2%
1,711,6541,357,3553,169,310
New MexicoD
+23.6%
376,998212,813697,012
NevadaD
+5.0%
490,071441,202972,132
New YorkD
+33.4%
3,755,4891,730,4396,055,151
OhioD
+6.8%
2,355,9232,053,9634,409,886
PennsylvaniaD
+12.9%
2,777,6802,134,8484,994,643
Rhode IslandD
+23.2%
231,477144,421375,898
TennesseeR
−10.8%
985,4501,227,4832,243,740
TexasR
−2.6%
4,045,6324,260,5538,371,655
UtahR
−31.7%
328,541665,2151,062,845
VirginiaD
+16.0%
1,910,3701,374,3133,346,248
VermontO
−27.4%
074,663272,330
WashingtonD
+16.9%
1,803,3641,282,8043,086,168
WisconsinD
+10.8%
1,472,9141,184,8852,657,799
West VirginiaD
+3.2%
288,808269,872582,911
WyomingR
−36.9%
61,227136,210203,095