Frederick F. Donahue, 54, a sales representative in the carpet department of Montgomery Ward & Co. in Wheaton for the last five years, died Dec. 31 at Suburban Hospital after a heart attack. He lived in Silver Spring.

A specialist in carpet sales and estimates for 31 years, he earlier had been associated with the Giant stores and other retail concerns.

Mr. Donahue was born in Oswego, N.Y. He moved to the Washington area as a boy. He attended Mount Rainier High School, where he played varsity basketball. He served in the Army in the Philippines in World War II, and was with the Occupation Army in Japan after the war. He held the Bronze Star.

Mr. Donahue was a member of St. Catherine Laboure Catholic Church in Wheaton, where he was active in the Confraternity of Christian Doctrine program and the Holy Name Society. He was a member of the Rosensteel Council of the Knights of Columbus and American Legion Post No. 268.

Survivors include his wife, Margaret, of Silver Spring; three daughters, Kathleen E. Dixon of Olney, and Josephine M. and Sharon M., both of Silver Spring, and a sister, Mary Moore of Riverdale.

The family suggests that expressions of sympathy be in the form of contributions to the American Heart Fund, or to the Diabetes Association of Washington.