Leon A. LeBuffe Sr., 61, a retired area life insurance salesman who was active in church organizations, died Nov. 1 at a hospital in Pompano Beach, Fla., after a heart attack. A resident of Silver Spring, he was vacationing in Florida when he was stricken.

Mr. LeBuffe worked for the Mutual Benefit Life Insurance Co. in Washington for 33 years before retiring in 1981. He was named the company's "man of the year" in 1955. In 1960, he received a national quality award from the National Association of Life Underwriters.

He was a member of St. Camillus Catholic Church in Silver Spring. He was a past president of a Catholic Youth Organization in Takoma Park.

Mr. LeBuffe was a native of Washington and a graduate of St. John's College High School. He graduated from Georgetown University in 1943. He served with the Army and the Office of Strategic Services during World War II.

Survivors include his wife, Elizabeth Rogers LeBuffe of Silver Spring; five sons, Leon A. Jr. of Washington, Dr. Francis P. of Falls Church, James R. of Trenton, N.J., Vincent J. of Hartford, Conn., and Paul A. of Malvern, Pa.; two sisters, Frances Howland and Adele Gregos, both of Holiday, Fla., and four grandchildren.