Play in Portland, Maine
at the Cross Insurance Arena
|National Arena League ( 2018–present)|
|Team colors||Maroon, gold, white|
|Owner(s)||National Sports Ventures|
|Head coach||James Fuller|
|League championships (0)|
|Conference championships (0)|
|Division championships (0)|
The Maine Mammoths are a professional indoor football team in the National Arena League (NAL) that began play for the 2018 season. Based in Portland, Maine, the Mammoths play their home games at the Cross Insurance Arena.  The Mammoths are the first indoor/arena football team to ever call the city of Portland and the state of Maine home.
After various speculation beforehand, the Mammoths were officially announced as a National Arena League (NAL) expansion team on December 5, 2017.  The Mammoths also introduced indoor football coaching veteran James Fuller as their first head coach  and indoor football veteran quarterback Jonathan Bane as their first player. 
|Maine Mammoths roster|
- "NAL Expansion Heads North to Maine-Expansion Team in Portland to be named Mammoths". NationalArenaLeague.com. December 5, 2017. Retrieved December 5, 2017.
- "Maine Mammoths make it official: Arena football coming to Portland". Portland Press Herald. December 5, 2017.
- "Maine Mammoths Hire Head Coach James Fuller- AFL Coaching Veteran takes the Helm for Maine". NationalArenaLeague.com. December 5, 2017. Retrieved December 5, 2017.