Harrison retired from the Army on February 28, 1957 after almost 40 years of service and settled in Chicago, where he served as Executive Director of the Evangelical Child Welfare Agency until 1960.
General Harrison served as president of Officers' Christian Fellowship from 1954-1972 and as president emeritus from 1972 until his death.
He was also a member of the Lownes Free Church and the Alumni Association of the United States Military Academy and as a trustee of The Stony Brook School in Stony Brook, New York.

Lieutenant general William K. Harrison Jr. died on May 25, 1987 in Bryn Mawr Terrace, a nursing home in Bryn Mawr, Pennsylvania, aged 91.
He was buried with full military honors at Arlington National Cemetery, Virginia.

His first wife, the former Eva Toole, and his second wife, the former Forrest King, are deceased.
He is survived by three sons, William K. III, W. Terry and Wayne King; a daughter, Evelyn H. Kent; 9 grandchildren; and 7 great-grandchildren.
Harrison retired from the Army on February 28, 1957 after almost 40 years of service and settled in Chicago, where he served as Executive Director of the Evangelical Child Welfare Agency until 1960. General Harrison served as president of Officers' Christian Fellowship from 1954-1972 and as president emeritus from 1972 until his death. He was also a member of the Lownes Free Church and the Alumni Association of the United States Military Academy and as a trustee of The Stony Brook School in Stony Brook, New York.
Lieutenant general William K. Harrison Jr. died on May 25, 1987 in Bryn Mawr Terrace, a nursing home in Bryn Mawr, Pennsylvania, aged 91. He was buried with full military honors at Arlington National Cemetery, Virginia.
His first wife, the former Eva Toole, and his second wife, the former Forrest King, are deceased. He is survived by three sons, William K. III, W. Terry and Wayne King; a daughter, Evelyn H. Kent; 9 grandchildren; and 7 great-grandchildren.
William Kelly Harrison Jr.