| 2003 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: | Ohio Valley Greyhounds |
| Conf1 Runner-Up: | Lake Charles Land Sharks |
| Conf2: | Pacific |
| Conf2 Champ: | Utah Warriors |
| Conf2 Runner-Up: | Omaha Beef |
| Finals: | Indoor Bowl III |
| Finals Champ: | Ohio Valley Greyhounds |
| Finals Runner-Up: | Utah Warriors |
| Seasonslist: | List of NIFL seasons |
| Seasonslistnames: | NIFL |
| Prevseason Link: | 2002 National Indoor Football League season |
| Prevseason Year: | 2002 |
| Nextseason Link: | 2004 National Indoor Football League season |
| Nextseason Year: | 2004 |
The 2003 National Indoor Football League season was the third season of the National Indoor Football League (NIFL). The league champions were the Ohio Valley Greyhounds, who wrapped up a perfect season by defeating the Utah Warriors in Indoor Bowl III and becoming the first team in league history to win back-to-back titles.
| Team | Overall | Conference | |||||
|---|---|---|---|---|---|---|---|
| Wins | Losses | Percentage | Wins | Losses | Percentage | ||
| Atlantic Conference | |||||||
| Eastern Division | |||||||
| Ohio Valley Greyhounds | 17 | 0 | 1.000 | 11 | 0 | 1.000 | |
| Lexington Horsemen | 9 | 6 | 0.600 | 6 | 4 | 0.600 | |
| Fort Wayne Freedom | 8 | 6 | 0.571 | 5 | 5 | 0.500 | |
| Myrtle Beach Stingrays | 6 | 8 | 0.429 | 5 | 6 | 0.455 | |
| Tennessee Riverhawks | 6 | 8 | 0.429 | 4 | 6 | 0.400 | |
| Evansville BlueCats | 1 | 13 | 0.071 | 0 | 10 | 0.000 | |
| Southern Division | |||||||
| Lake Charles Land Sharks | 13 | 3 | 0.812 | 8 | 2 | 0.800 | |
| Houma Bayou Bucks | 10 | 5 | 0.667 | 7 | 3 | 0.700 | |
| Austin Rockers | 7 | 7 | 0.500 | 6 | 4 | 0.600 | |
| Beaumont Drillers | 6 | 8 | 0.429 | 5 | 5 | 0.500 | |
| Oklahoma Crude | 2 | 12 | 0.143 | 2 | 8 | 0.200 | |
| Tupelo FireAnts | 2 | 12 | 0.143 | 2 | 8 | 0.200 | |
| Pacific Conference | |||||||
| Northern Division | |||||||
| Omaha Beef | 12 | 4 | 0.750 | 9 | 1 | 0.900 | |
| Lincoln Capitols | 9 | 5 | 0.643 | 7 | 3 | 0.700 | |
| Sioux City Bandits | 6 | 8 | 0.429 | 5 | 5 | 0.500 | |
| La Crosse Night Train | 4 | 10 | 0.286 | 4 | 6 | 0.400 | |
| Show-Me Believers | 4 | 10 | 0.286 | 3 | 7 | 0.300 | |
| Tri-City Diesel | 4 | 10 | 0.286 | 2 | 8 | 0.200 | |
| Western Division | |||||||
| Utah Warriors | 13 | 4 | 0.765 | 7 | 3 | 0.700 | |
| Sioux Falls Storm | 10 | 5 | 0.667 | 7 | 3 | 0.700 | |
| Bismarck Roughriders | 9 | 6 | 0.600 | 5 | 5 | 0.500 | |
| Rapid City Red Dogs | 7 | 7 | 0.500 | 5 | 5 | 0.500 | |
| Billings Outlaws | 6 | 8 | 0.429 | 3 | 7 | 0.300 | |
| Wyoming Cavalry | 4 | 10 | 0.286 | 3 | 7 | 0.300 | |
Round 1
Semifinals