Life history data were collected from Suwannee River and Okefenokee Swamp warmouth (Lepomis gulosus) from 19 July 1968 through 28 June 1973. Suwannee River warmouth became sexually mature in the third year of life. while warmouth from the Okefenokee Swamp became sexually mature in the second year of life. Collection of fecund warmouth suggested that the nesting season extended from April to late July or early August and that peak spawning generally occurred in early May. Fecundity estimates varied from 3,029 to 22,850 ova per female and generally increased with fish length. The average total lengths of Suwannee River warmouth at ages I through VIII were 52, 73, lOS, 132, 158, 177, 189, and 214 mm, respectively. Okefenokee Swamp warmouth were 54, 90,127,154,179,179, and 190 mm at ages I through VII, respectively. The length-weight relationship of Suwannee River warmouth was log W=-5.4996+ 3.3726 Log L. The equation, log W=-5.2395+3.27361og L, described the length weight relationship of Okefenokee Swamp warmouth. Warmouth of all lengths from both locations were carnivorous and fed on insects, fish, and crustaceans.