This is a list of seasons completed by the Milwaukee Mustangs. The Mustangs were a professional arena football franchise based in Milwaukee, Wisconsin. The team was established in 2009 as the Milwaukee Iron. They changed their name to the Milwaukee Mustangs prior to the 2011 season. They played in the af2 in 2009 and in the Arena Football League from 2010 to 2012. They made the playoffs once.
| ArenaBowl Champions | ArenaBowl Appearance | Division Champions | Playoff Berth |
| Season | Team | League | Conference | Division | Regular season | Postseason results | |||
|---|---|---|---|---|---|---|---|---|---|
| Finish | Wins | Losses | |||||||
| Milwaukee Iron | |||||||||
| 2009 | 2009 | af2 | American | Midwest | 5th | 5 | 11 | ||
| 2010 | AFL | National | Midwest | 1st | 11 | 5 | Won Conference Semifinal (Chicago) 64–54 Lost Conference Championship (Spokane) 57–60 | ||
| Milwaukee Mustangs | |||||||||
| 2011 | AFL | American | East | 3rd | 7 | 11 | |||
| 2012 | AFL | American | East | 3rd | 5 | 13 | |||
| Total | 28 | 40 | (includes only regular season) | ||||||
| 1 | 1 | (includes only the postseason) | |||||||
| 29 | 41 | (includes both regular season and postseason) | |||||||