The northern red-bellied turtle (Pseudemys rubriventris) or American red-bellied turtle is a species of turtle in the Pseudemys (cooter) genus of the Emydidae family.

A fairly large river turtle, it averages about 29 to 30 cm (11 to 12 in) in length and weighs on average around 3 kg (6.6 lb), although large females can measure up to 40 cm (16 in) in length. It is endemic to the United States. The current range of the red-bellied turtle includes a colony in Massachusetts which was previously a separate species (Pseudemys rubriventris bangsii) as well as the coastal areas of New Jersey, Pennsylvania, Delaware, Maryland, Virginia and North Carolina.