Julius Diamond, 77, a former owner of shoe stores in Wheaton and Silver Spring and a resident of the Washington area for more than 50 years, died Saturday at Mt. Sinai Hospital in Miami Beach. He had been suffering from a heart ailment.

Mr. Diamond opened the first of his stores, Quality Shoes, in 1945. He later opened a second store. He closed the business in 1960.

A native of Baltimore, Mr. Diamond came to Washington in 1921. He began in the shoe business as an employee of various department stores. He was a buyer of men's shoes for The Hecht Co. for many years before going into business for himself. After closing his stores, he worked for other outlets until 1975, when he moved to Fort Lauderdale, Fla.

Mr. Diamond was a Mason and a member of the Benjamin Franklin Lodge.

Survivors include his wife, Ida K., of the home in Fort Lauderdale; two sons, Louis H., of Bethesda and Morton S., of Silver Spring; three brothers, David S., of Margate, Fla., and Aaron and Nathaniel, both of Fort Lauderdale; two sisters, Sara D. Berlin, also of Fort Lauderdale, and Leah D. Blum, of Bethesda and Pompano Beach, Fla., and five grandchildren.