Lake Jean is a lake in Luzerne County and Sullivan County, in Pennsylvania, in the United States. It has a surface area of approximately 245 acres (99 ha) and is situated in Colley Township, Sullivan County and Fairmount Township, Luzerne County.[1] The lake's main inflow is the outlet of Ganoga Lake. Lake Jean is fairly shallow, with an average depth of 5.9 feet (1.8 m).