| 2004 NIFL season | |
| League: | National Indoor Football League |
| Sport: | indoor American football |
| Season: | Regular season |
| Season Champs: | Ohio Valley Greyhounds |
| Playoffs: | Playoffs |
| Conf1: | Atlantic |
| Conf1 Champ: | Lexington Horsemen |
| Conf1 Runner-Up: | Ohio Valley Greyhounds |
| Conf2: | Pacific |
| Conf2 Champ: | Sioux Falls Storm |
| Conf2 Runner-Up: | Billings Outlaws |
| Finals: | Indoor Bowl IV |
| Finals Champ: | Lexington Horsemen |
| Finals Runner-Up: | Sioux Falls Storm |
| Seasonslist: | List of NIFL seasons |
| Seasonslistnames: | NIFL |
| Prevseason Link: | 2003 National Indoor Football League season |
| Prevseason Year: | 2003 |
| Nextseason Link: | 2005 National Indoor Football League season |
| Nextseason Year: | 2005 |
The 2004 National Indoor Football League season was the fourth season of the National Indoor Football League (NIFL). The league champions were the Lexington Horsemen, who defeated the Sioux Falls Storm in Indoor Bowl IV.
| Team | Overall | Conference | |||||
|---|---|---|---|---|---|---|---|
| Wins | Losses | Percentage | Wins | Losses | Percentage | ||
| Atlantic Conference | |||||||
| Eastern Division | |||||||
| Ohio Valley Greyhounds-xy | 11 | 3 | 0.786 | 6 | 1 | 0.857 | |
| Atlantic City CardSharks | 9 | 5 | 0.643 | 6 | 2 | 0.750 | |
| Carolina Stingrays | 5 | 7 | 0.417 | 4 | 5 | 0.444 | |
| Staten Island Xtreme | 3 | 11 | 0.214 | 2 | 7 | 0.222 | |
| Greenville Riverhawks | 0 | 4 | 0.000 | 0 | 3 | 0.000 | |
| Southern Division | |||||||
| Houma Bayou Bucks | 11 | 3 | 0.786 | 9 | 2 | 0.818 | |
| Tupelo FireAnts | 8 | 6 | 0.571 | 5 | 5 | 0.500 | |
| Beaumont Drillers | 8 | 6 | 0.571 | 4 | 5 | 0.444 | |
| Lake Charles Land Sharks | 7 | 7 | 0.500 | 3 | 6 | 0.333 | |
| Waco Marshals | 2 | 8 | 0.200 | 1 | 4 | 0.250 | |
| Northern Division | |||||||
| Lexington Horsemen-xy | 10 | 4 | 0.714 | 5 | 1 | 0.833 | |
| Fort Wayne Freedom | 8 | 6 | 0.571 | 3 | 3 | 0.500 | |
| Show-Me Believers | 9 | 5 | 0.643 | 2 | 4 | 0.333 | |
| Evansville BlueCats | 4 | 10 | 0.286 | 2 | 4 | 0.333 | |
| Pacific Conference | |||||||
| Northern Division | |||||||
| Sioux Falls Storm | 11 | 3 | 0.786 | 6 | 1 | 0.857 | |
| Omaha Beef | 9 | 5 | 0.643 | 4 | 2 | 0.667 | |
| Sioux City Bandits | 8 | 6 | 0.571 | 3 | 3 | 0.500 | |
| Lincoln Capitols | 3 | 11 | 0.214 | 0 | 5 | 0.000 | |
| Western Division | |||||||
| Billings Outlaws | 11 | 3 | 0.786 | 6 | 1 | 0.857 | |
| Utah Warriors | 7 | 8 | 0.467 | 2 | 2 | 0.500 | |
| Wyoming Cavalry | 5 | 9 | 0.357 | 2 | 4 | 0.333 | |
| Black Hills Red Dogs | 3 | 11 | 0.214 | 1 | 5 | 0.000 | |
| Southern Division | |||||||
| Tri-City Diesel-xy | 11 | 4 | 0.733 | 6 | 0 | 1.000 | |
| Wichita Falls Thunder | 1 | 8 | 0.111 | 0 | 3 | 0.000 | |
| Oklahoma Crude | 1 | 11 | 0.083 | 0 | 3 | 0.000 | |
| Colorado Venom | 0 | 1 | 0.000 | 0 | 0 | 0.000 | |