Charles LeClair, 65, a retired FBI special agent who had more than 30 years' government service, died of an apparent heart attack Wednesday at his home in Falls Church.

Mr. LeClair was born in Sandusky, Ohio. He came to Washington in 1939 and joined the FBI as a clerk in the fingerprint section. At the same time, he attended night classes at the old Columbus Law School, from which he graduated in 1942. He was appointed a special FBI agent last year.

During World War II, Mr. LeClair served in the Navy from 1942 * to 1946. He rejoined the bureau in 1946 and was assigned to field offices in Savannah, Ga., and Richmond. He was assigned to the Washington field office in 1954 and retired from there in 1971.

Mr. LeClair was a member of the Catholic War Veterans, the American Legion and the National Association of Retired Federal Employees.

His wife, the former Mary Celeste Plageman, died in 1960.

Survivors include two daughters, Mary Louise St. Clair, of Leesburg, Va., and Dianne Marie LeClair, of the home in Falls Church; a sister, Mary Melvina Gilbeaut, of Sandusky, and four grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to St. Anthony's Catholic Church in Falls Church, to the American Cancer Society, orto the American Heart Association. CAPTION: Picture, CHARLES LeCLAIR