Waterman Reservoir is a large lake along Putnam Pike in Glocester and Greenville in Providence County, Rhode Island.

The Waterman Reservoir was created in 1838 on the site of a swamp and is 318 acres (129 ha) when full with an average depth of nine feet (2.7 m). It was named after Resolved Waterman, an early eighteenth-century Greenville resident and landowner. Prior to the creation of the reservoir, the area was swampy, so a dam was constructed to create the reservoir and at the same time a causeway (now part of the Putnam Pike) was built so travelers no longer had to go around the swamp using Austin Avenue.