Frank Stewart Coard, a Maricopa rancher, died yesterday at a hospital in San Luis Obispo. He was 77. Mr. Coard was born in Overland, Kan., on Dec. 4, 1886. He moved to Ventura County near Maricopa and homesteaded a ranch there in 1919. He was a veteran of World War I. Survivors include tow sisters, Mrs. William Wright of Dyer, Nev. and Mrs. Ruben Wright of Centralia, Wash.; one brother, James of Dyer. Graveside funeral services will be held at 2:30 p.m. Thursday at the West Side District Cemetery, with the Erickson and Brown Funeral Home in charge.