Grier was married to Bernice Lewis until they divorced. Then he married Margie Grier in 1972. They divorced in 1978, but remarried in 1980. Margie Grier died in 2001. In 2013, he married teacher Cydnee Seyler. Grier has three children (one daughter from an early relationship, one adopted daughter from Bernice and one son with Margie).