William W. Scranton, the moderate Republican governor of Pennsylvania from 1963 to 1967, who lost a run for his party’s presidential nomination in 1964 and later served as the United States representative to the United Nations, died on Sunday in Montecito, Calif. He was 96.

The cause was a cerebral hemorrhage, Micheal DeVanney, a family spokesman, said.

A descendant of Mayflower colonists and the founders of Scranton, Pa., heir to a fortune in railroads and utilities, the soft-spoken Mr. Scranton was heralded as a “Kennedy Republican” in the early 1960s. His amiable patrician style, and his independence as a fiscal conservative who supported civil rights and other liberal programs, proved popular with voters. He seemed poised for a national political future....