Oxoboxo River (/ˈɑːksoʊˌbɑːksoʊ/) is a census-designated place (CDP) in the town of Montville in New London County, Connecticut, United States.

[2] The statistical area encompasses the town center of Montville, as well as the adjacent villages of Palmertown and Uncasville.

Postal Service includes the entire area of the CDP in ZIP code 06382, for which the USPS uses "Uncasville" as the place name.

According to the United States Census Bureau, the CDP has a total area of 11.6 km2 (4.5 mi2), of which 11.0 km2 (4.3 mi2) is land and 0.6 km2 (0.2 mi2) (5.1%) is water.

31.6% of all households were made up of individuals, and 12.6% had someone living alone who was 65 years of age or older.