| 2006 NIFL season | |
|---|---|
| League | National Indoor Football League |
| Sport | indoor American football |
| Regular season | |
| Season champions | Fayetteville Guard |
| Playoffs | |
| Atlantic champions | Fayetteville Guard |
| Atlantic runners-up | RiverCity Rage |
| Pacific champions | Billings Outlaws |
| Pacific runners-up | Rapid City Flying Aces |
| Indoor Bowl VI | |
| Champions | Billings Outlaws |
| Runners-up | Fayetteville Guard |
The 2006 National Indoor Football League season was the fifth season of the National Indoor Football League (NIFL). The league champions were the Billings Outlaws, who defeated the Fayetteville Guard in Indoor Bowl VI.