King married Tabitha Spruce in 1971. She too is a Novelist and philanthropic Activist. The couple own and occupy three different houses: one in Bangor, Maine, one in Lovell, Maine, and for the winter a waterfront mansion located off the Gulf of Mexico in Sarasota, Florida. The Kings have three children, a girl and two boys, and four grandchildren. Their daughter Naomi is a Unitarian Universalist Church minister in Plantation, Florida, with her same-sex partner, Rev. Dr. Thandeka. Both of the Kings' sons are authors: Owen King published his first collection of stories, We're All in This Together: A Novella and Stories, in 2005. Joseph Hillstrom King, who writes as Joe Hill, published a collection of short stories, 20th Century Ghosts, in 2005. His debut novel, Heart-Shaped Box (2007), was optioned by Warners Bros.