Charles L. Koryda, 57, the principal of Hutchinson Elementary School in Herndon since 1977, died July 16 at a clinic in Nags Head, N.C., after a heart attack. He lived in McLean and was vacationing in Nags Head when he was stricken.

Mr. Koryda was a native of Bellaire, Ohio. He was a 1950 graduate of Ohio University and earned his master's degree in education at the University of Maryland. He served with the Army in Europe during World War II and the Korean conflict. His decorations include the Bronze Star medal.

He moved to Washington in 1955 when he became civilian director of education at Fort Meade. In 1959, he became principal of Madison Elementary in Falls Church. He was principal of Lewinsville Elementary in McLean when he transferred to Hutchinson.

Mr. Koryda was president of the McLean Little League and the Lewinsville PTA. He was a past vice president of the Lewinsville Civic Association.

Survivors include his wife, Margaret M., of McLean; two sons, Charles L. Jr., of Falls Church, and Richard A., of Vienna; two daughters, Barbara K. Biallas, of Springfield, and Patricia K. Morris, of McLean; two stepchildren, Thomas and Nancy Moon, both of McLean; his mother, Anna Myers, of Bellaire; two sisters, Martha George, of Bridgeport, Ohio, and Blanche Hercules, of Wheeling Island, W.Va., and one grandchild.