Harold L. Bigler, 64, a retired officer with the old U.S. Information Agency, died Thursday at Washington Hospital Center. He had a kidney ailment.

Mr. Bigler retired from the government in 1971 with 30 years' service. He was a partner in a Washington public relations firm,, BK&M, until 1974, when he joined Sarah McClendon, a Washington correspondent who publishes a newsletter, as a reporter and editor. he remained with McClendon until last October, when he retired for reasons of health.

A native of Justus, Ohio, Mr. Bigler graduated from Mount Union College in Alliance, Ohio, in 1937. He also did graduate work at Kent State University. He taught in high schools in Canton, Ohio, until 1942, when he was commissioned in the Navy in World War II.

He was assigned to Washington, where he worked on training films for the duration of the war.

In 1946, he became a civilian employe of the Navy Department, working on training films. In 1951, he joined the USIA, now the International Communication Agency.

His foregin assignments included tours as a cultural attache in U.S. embassies in Finland, Austria, Pakistan and Thailand. He served in Washington from 1956 to 1960, while on loan to the old Atomic Energy Commission, and from 1966 until his retirement.

Survivors include his wife, Shirley, of the home in Bethesda; a son, Christopher; also of Bethesda; a daughter, Rebecca, of California; his father, Edward Bigler, of Canton, Ohio; two brothers, James, of Martinsville, Va., and Robert, of Camden, N.J., and a sister, Mrs. Robert Arnold, of Chicago.