M. D. Fitzgerald, 83, owner and operator of Fitzgerald's Store in Great Falls. Va., since 1941, died at Fairfax Hospital on Sunday of a heart ailment.

Mr. Fitzgerald, who was known to friends and customers as "Mr. Fitz." was born in Nelson County. Va. He graduated from Piedmont Business College in Lynchburg, Va., and served in the Army in World War I. In 1918, he moved to Alexandria, where he was a sales representative and manager for the H. M. Wagner Co. in Washington. He remained in Alexandria until 1941, when he moved to Great Falls and opened his grocery store there. He remained active in the business until his death.

Mr. Fitzgerald was a charter member of the Providence Baptist Church of Tysons Corner. He had served as head usher at the church and recently was made a lifetime deacon.

He also was a former grand counselor and secretary of the United Commercial Travelers, a member of the Great Fall Lions Club and a member of the Henry Know Field Masonic Lodge in Alexandria.

Survivors include his wife, Margaret, of the home in Great Falls: three daughters, Marjorie Freeman, of Falls Church, Eillen Smith, of San Marino, Calif., and Evelyn Hart, of New York City: a son, Robert C., a former of Virginia state senator, of Oakton; a sister, Flossie Ogden, of Springfield: three brothers, Beery, of Franconia, Raymond, also of Springfield, and Coscy, of Waynesboro, Va., and 10 grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Fitzgerald Memorial Fund, Providence Baptist Church, Vienna.