Clement R. Hoopes, 72, a former official of the State Department and the old U.S. Information Agency and a founder of the National Wax Museum in Washington, died Tuesday at the Chester-Crozer Medical Center in Chester, Pa. He had a series of strokes.

Mr. Hoopes was born in Philadelphia and grew up in Wilmington, Del. He worked in the publishing business in New York City until World War II, when he joined the Navy and rose to the rank of commander

In 1950, he joined the State Department as a Foreign Service officer and worked on Marshall Plan aid in Washington and Ireland. He later worked at the Commerce Department, in president Dwight D. Eisenhower's People-to-People program and in the USIA. He resigned in 1958 and moved to his farm in West Grove, Pa.

That year, he and Frank Dennis founded the National Wax Museum here. Mr. Hoopes was a member of its board of directors.

In 1973, Mr. Hoopes moved to Chadds Ford, Pa., where he was commissioner of the Brandywine Battlefield.

His first wife, Marcia Height Hoopes, died in 1973.

Survivors include his wife, Elinore, of the homes in Chadds Ford and Del Ray Beach, Fla.; three sons by his first marriage, David, of Washington, Matthew, of Wolfeboro, N.H., and Thomas, of Alton, N.H., and six grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the University of Pennsylvania School of Veterinary Medicine Research Center at New Bolton, Kennett Square, Pa.