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1876–2024
Elections / 2004 · US Senate

The 2004 Senate map

34 Senate contests were decided in 2004: Democrats won 15, Republicans 19. Every contest below links to its page with the state's full Senate history.

2004 US Senate elections
2004 Senate margin by stateA map of the United States with each state filled by its 2004 result — deep red (Republican) through neutral to deep blue (Democratic), and gold where an independent or third-party candidate carried the state.Alabama · R+35.2Alaska · R+3.0Arizona · R+56.1Colorado · D+4.8Florida · R+1.1Georgia · R+17.9Indiana · D+24.4Kansas · R+41.7Maine · —Massachusetts · —Minnesota · —New Jersey · —North Carolina · R+4.6North Dakota · D+36.6Oklahoma · R+11.5Pennsylvania · R+10.6South Dakota · R+1.2Texas · —Wyoming · —Connecticut · D+34.2Missouri · R+13.3West Virginia · —Illinois · D+42.9New Mexico · —Arkansas · D+11.8California · D+19.9Delaware · —District of Columbia · —Hawaii · D+54.5Iowa · R+42.3Kentucky · R+1.3Maryland · D+31.1Michigan · —Mississippi · —Montana · —New Hampshire · R+32.5New York · D+41.2Ohio · R+27.7Oregon · D+31.6Tennessee · —Utah · R+40.7Virginia · —Washington · D+12.2Wisconsin · D+11.2Nebraska · —South Carolina · R+9.6Idaho · R+100.0Nevada · D+25.9Vermont · D+46.1Louisiana · R+3.5Rhode Island · —
2004Senate margin
D+60
R+60
States with a Senate contest in 2004, each filled by its result. States without a seat up this cycle are faint.
Smaller states, enlarged
VTD+46.1NHR+32.5CTD+34.2MDD+31.1
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
34
Democratic wins
15
Republican wins
19
Democratic 1515Republican 1919
Every contest
Statewide totals; candidate-level detail joins when the raw store is re-fetched with names.
StateWonMarginDemocraticRepublicanTotal
AlaskaR
−3.0%
140,424149,773307,892
AlabamaR
−35.2%
595,0181,242,2001,837,218
ArkansasD
+11.8%
580,973458,0361,039,221
ArizonaR
−56.1%
404,5071,505,3721,961,677
CaliforniaD
+19.9%
6,955,7284,555,92212,053,242
ColoradoD
+4.8%
1,081,188980,6682,107,472
ConnecticutD
+34.2%
945,347457,7491,424,726
FloridaR
−1.1%
3,590,2013,672,8647,429,707
GeorgiaR
−17.9%
1,287,6901,864,2023,220,943
HawaiiD
+54.5%
313,62987,172415,347
IowaR
−42.3%
412,3651,038,1751,478,753
IdahoR
−100.0%
0499,796499,796
IllinoisD
+42.9%
3,597,4561,390,6905,138,563
IndianaD
+24.4%
1,496,976903,9132,428,233
KansasR
−41.7%
310,337780,8631,129,022
KentuckyR
−1.3%
850,855873,5071,724,362
LouisianaR
−3.5%
877,482943,0141,848,056
MarylandD
+31.1%
1,504,691783,0552,321,571
MissouriR
−13.3%
1,158,2611,518,0892,706,402
North CarolinaR
−4.6%
1,632,5271,791,4503,471,720
North DakotaD
+36.6%
212,14398,553310,696
New HampshireR
−32.5%
221,549434,847656,396
NevadaD
+25.9%
494,805284,640810,068
New YorkD
+41.2%
4,384,9071,625,0696,702,875
OhioR
−27.7%
1,961,1713,464,3565,425,527
OklahomaR
−11.5%
596,750763,4331,446,846
OregonD
+31.6%
1,128,728565,2541,780,550
PennsylvaniaR
−10.6%
2,334,1262,925,0805,558,525
South CarolinaR
−9.6%
704,384857,1671,595,935
South DakotaR
−1.2%
193,340197,848391,188
UtahR
−40.7%
258,955626,640902,884
VermontD
+46.1%
216,97275,398307,034
WashingtonD
+12.2%
1,549,7081,204,5842,818,651
WisconsinD
+11.2%
1,632,6971,301,1832,948,909