The Mohegan Sun Arena is a 10,000 seat multi-purpose arena in the Uncasville area of Montville, Connecticut located inside the Mohegan Sun casino resort. The arena facility features 30,000 square feet (2,800 m2) of configurable exhibition space and a 400-foot (120 m) clear span. It was built by the Perini Building Company, and opened in October 2001.

Uncasville is a village in the town of Montville, Connecticut, United States. It is located in southeastern Montville, at the mouth of the Oxoboxo River where it flows into the Thames River. The name is now applied more generally to all of the east end of Montville, which is the area served by the Uncasville ZIP Code (06382).