Dale Edward Doty, 68, a Washington lawyer since 1954 who had been an assistant secretary of the Interior and a member of the Federal Power Commission, died of a heart attack Aug. 19 at his home in Falls Church.

Mr. Doty was born in Redlands, Calif. A graduate of Pomona College in 1936, he earned a master's degree in public administration from the University of Cincinnati. He later received a law degree from George Washington University.

He joined the federal government in 1939 as a field aide with the United Pueblo Indian Agency in the Department of the Interior. Later that year, he came to Washington and became a land economist with the old General Land Office. In 1943, he became an administrative assistant in the Office of the Assistant Secretary of the Interior. He later was a special assistant to the Under Secretary of the Interior. He was named assistant secretary for public land management in 1950.

Mr. Doty was named to the Federal Power Commission in 1952. After his term ended in 1954, he began a law practice here, specializing in the field of natural resources.

He received the Interior Department's Distinguished Service Award in 1952. He was a member of the National Capital Democratic Club.

His first wife, Mary Broadfield Doty, died in 1973.

Survivors include his wife, Alma O., of Falls Church; two stepsons, Timothy J. Stratton of Edgewater, Md., and A. Clark Stratton III of Annandale; three sisters; a brother, Walter, of Tucson, Ariz., and two grandchildren.