Watervliet Charter Township is a charter township of Berrien County in the U.S. state of Michigan. The population was 3,102 at the 2010 census. The township originally included the area of Coloma Township, which separated in 1917. The township surrounds the city of Watervliet, but the two are administered autonomously. The township also contains a portion of the Paw Paw Lake community. The Paw Paw River and Paw Paw Lake are prominent features of the township. Interstate 94 crosses east–west through the south of the township with two interchanges, and M-140 runs north–south through the area.