Florence H. Caskey, 91, a resident of the Washington area for more than 50 years who was active in church work, died Friday at Goodwin House in Alexandria after a heart attack.

Mrs. Caskey was born in Columbus, Ohio, and graduated from Ohio State University. After her marriage to Fred A. Caskey, a lawyer, the couple lived in Marietta, Ohio.

They moved to Washington in 1920 and a year later to Scarsdale, N.Y. They returned to Washington in 1923 Mr. Caskey, who practiced law here, died in 1961.

Mrs. Caskey was a member of St. Alban's Episcopal Church and worked on the Rector's Aid Society. During World War II, she was a Red Cross Gray Lady at the Bethesda Naval Hospital. She lived in Washington until moving to Goodwin House 11 years ago.

Survivors include a daughter, Mrs. James D. C. Gouldin of Alexandria, four grandchildren, and eight great-grandchildren. Two sons, Frederick A. Jr. and Navy Lt. (j.g.) John T., died earlier. Lt. Caskey was killed in action in the Pacific in the closing days of World War II.

The family suggests that expressions of sympathy be in the form of contributions to the Goodwin House Memorial Fund, Goodwin House, Alexandria.