East Branch Sebasticook River
 The East Branch Sebasticook River is a tributary of the Sebasticook River in central Maine in the United States. It is part of the Kennebec River watershed.From the outflow of Lake Wassookeag (45°01′37″N 69°17′19″W) in Dexter the river runs about 12.7 miles (20.4 km) south to Sebasticook Lake. From the outflow of the lake (44°50′23″N 69°16′33″W) in Newport the river runs about 9.5 miles (15.3 km) southwest to its confluence with the Sebasticook in Detroit.