Peter was the son of George Carroll & Ann Baker Carroll. He married Louisa McKenzie Wood, daughter of Thomas & Mary Wood, abt. 1833/4. They had 17 children, of whom 8 lived to adulthood. After Louisa's death, he married Emily F. West in 1879. They had 3 children. He served as a Justice of the Peace in Chattooga county, and was buried with Masonic honors.