Jonathan Kimble Simmons is an American television, film, and voice actor.
Simmons was born on January 9, 1955, in Grosse Pointe, Michigan, a suburb of Detroit, the son of Patricia (née Kimble), an administrator, and Donald William Simmons, a music teacher at Parcells Middle School. One of three children, J.K. Simmons attended Ferry Elementary School in Grosse Pointe Woods.
In 1965, when he was ten years old, his family moved to Worthington, Ohio, a suburb of Columbus, Ohio. From 1970–1972, Simmons attended Worthington High School, where he participated in drama, football, and choir.
In 1973, when he was eighteen, they moved to Missoula, Montana, where his father became director of the School of Music at the University of Montana. The younger Simmons graduated from the University of Montana in 1978 with a music degree. During his tenure, he became a member of the music-oriented fraternity Phi Mu Alpha Sinfonia. Later, Simmons moved to Seattle and became a member of the Seattle Repertory Theatre.