Uncasville is an region in the town of Montville, Connecticut, United States. It is a village in southeastern Montville, at the mouth of the Oxoboxo River.

In 1994 the federal government officially recognized the Mohegan Indian Tribe of Connecticut, which had historically occupied this area.

That year Congress passed the Mohegan Nation (Connecticut) Land Claim Settlement Act.

It authorized the United States to take territory into trust in northeastern Montville for the Mohegan tribe's use as a reservation.

Since gaining a reservation, in 1996 the tribe advanced the Mohegan Sun casino resort.

It has also assembled the Mohegan Sun Arena on their land.

The village of Uncasville became the site of the first woolen foundry in the United States, advanced by the brothers John and Arthur Schofield.

Their carding and spinning foundry was positioned at the mouth of the Oxoboxo River. The Uncasville Manufacturing Corporation directed on the river into the early 20th century, as shown in the postcard image to the right.

In 1961, it formed a joint venture, the United Nuclear Corporation, with Mallinckrodt Corporation of America, and Nuclear Development Corporation of America.

As colonial agents had sold territory reserved for them, the Mohegan citizens had lost recognition as a sovereign entity.

Congress passed the Mohegan Nation (Connecticut) Land Claim Settlement Act. It authorized the United States to take into trust the United Nuclear site for use as Mohegan reservation lands; with this, the law also extinguished any other Mohegan territory claims in Connecticut.

They opened the Mohegan Sun casino on October 12, 1996, near the former Fort Shantok site above the Thames River.

Uncasville village is positioned in southeastern Montville near the confluence of the Oxoboxo and Thames rivers.

All of easterly Montville, positioned on the shore of the Thames, is served by the Uncasville ZIP code, 06382, and is also known as Uncasville.

The Mohegan Sun resort is about 3 miles (4.8 km) north of Uncasville village.

The Mohegan Sun casino in Uncasville, established in 1996, has turn into one of the biggest casinos in the world.

Mohegan Nation (Connecticut) Land Claim Settlement Act, Pub.