| Outgoing Members: | These seats' last election (2000) |
| Elected Members: | These seats' next election (2008) |
| Election Name: | 2004 West Virginia Senate elections |
| Seats Needed2: | 7 |
| Country: | West Virginia |
| Image1 Size: | x180px |
| Ongoing: | no |
| Before Election: | Earl Ray Tomblin |
| Senate President | |
| After Election: | Earl Ray Tomblin |
| After Party: | West Virginia Democratic Party |
| Type: | legislative |
| Map Size: | 250px |
| Before Party: | West Virginia Democratic Party |
| Party1: | West Virginia Democratic Party |
| Leader1: | Earl Ray Tomblin |
| Leaders Seat1: | SD 7 |
| Leader Since1: | 1995 |
| Popular Vote1: | 418,869 |
| Percentage1: | 52.7% |
| Next Year: | 2006 |
| Leader2: | Vic Sprouse |
| Leader Since2: | 1998 |
| Party2: | West Virginia Republican Party |
| Next Election: | 2006 West Virginia Senate election |
| Seats For Election: | 17 of 34 seats in the West Virginia Senate |
| Majority Seats: | 18 |
| Previous Election: | 2002 West Virginia Senate election |
| Previous Year: | 2002 |
| Election Date: | November 2, 2004 |
| Leaders Seat2: | SD 8 |
| Popular Vote2: | 373,728 |
| Percentage2: | 47.0% |
| 1Blank: | Seats up |
| 1Data1: | 13 |
| 1Data2: | 4 |
| 2Blank: | Seats won |
| 2Data1: | 10 |
| 2Data2: | 7 |
| Seat Change1: | 3 |
| Seat Change2: | 3 |
| Seats Before1: | 24 |
| Seats Before2: | 10 |
| Seats After1: | 21 |
| Seats After2: | 13 |
The 2004 West Virginia Senate election took place on Tuesday, November 2, 2004, to elect members to the 77th and 78th Legislatures; held concurrently with the presidential, U.S. House, and gubernatorial elections.[1] State senate seats in West Virginia are staggered, with senators serving 4-year terms. 17 of the 34 state senate seats were up for election. While Republican candidate for George W. Bush won the state in the presidential election by 13 points, the Democratic Party won a majority of the vote for state senate candidates. Republicans managed to flip 3 seats, chipping away at the Democrats' supermajority.
| Party | Candidates | Votes | % | Seats | |||||
|---|---|---|---|---|---|---|---|---|---|
| Before[3] | Up | Won | After | +/– | |||||
| Democratic | 16 | 418,869 | 52.7 | 24 | 13 | 10 | 21 | 3 | |
| Republican | 17 | 373,728 | 47.0 | 10 | 4 | 7 | 13 | 3 | |
| Mountain | 1 | 2,048 | 0.3 | 0 | 0 | 0 | 0 | ||
| Write-in | 1 | 5 | nil | 0 | 0 | 0 | 0 | ||
| Total | 794,650 | 100% | 34 | 17 | 34 | ||||