George Ancil Sites, 56, a retired teacher, counselor and administrator in the Montgomery County school system, died Sunday at the Veterans Administration Hospital here following surgery.

A resident of Silver Spring for many years, he had lived in Williamsport, Md. since retiring last year. His last position had been with Cabin John Junior High School.

Mr. Sites, who had joined the Montgomery County school system in 1948 and who taught English and history, had served at Takoma Park and Francis Scott Key junior high schools.

Born in Washington County, Md., he attended Frostburg State Teachers College and graduated from the University of Maryland.

He served with the Army Air Corps as a control tower operator in the Pacific and received the Bronze Star.

Mr. Sites had been a member of the Silver Spring Stake of the Church of Jesus Christ of Latter Day Saints for many years and more recently of the Hagerstown Ward.

He is servived by his wife, Peggy Z., a son, Mark, and a daughter, Lisa, all of the home; another son, Douglas, of Stafford, England; his mother, Mamie Sites, and a sister, Phyllis Hill, both of Boensboro, Md., and three other sisters, Constance Wessells, of Baltimore, Carmen Cormany and Denise Bricker, of Chamberburg, Pa., and Alita Lichtenwalter, of Hinsdale, III.