The cause of death was not released.
Born in Leighton, Ala., Sledge began recording music in the 1960s. "When a Man Loves a Woman" hit No. 1 when it was released in 1966, and was reissued in 1987. It has been covered numerous times, most notably by Michael Bolton in 1991, and featured prominently in several movies, including The Big Chill.
His other songs include "I'll Be Your Everything" and "Ain't No Sunshine."
Sledge continued recording through the 1990s and was inducted into the Rock & Roll Hall of Fame in 2005.