Frederick was born at
Gaston Co., North Carolina, on 28 October 1834. He was the son of
Frederick Lineberger Dellinger and
Mary "Polly" Dellinger. He was inducted into the military on 15 March 1862. Frederick reported for active duty at
Gettysburg, Adams Co., Pennsylvania, in July 1863. He was released from active duty on 8 September 1863. A letter dated 14 April 1864 from soldier Frederick Washington Dellinger is addressed to "Margaret W.B. Brown." It begins "Dear Sister" and ends "From your affectionate brother." He married
Julia Frances Hendrick at
Cleveland Co., North Carolina, on 17 May 1866. He married
Belle Sain. He married
Minnie Eualine Cobb in 1901. Frederick died on 10 July 1932 at age 97. His body was interred in July 1932 at
Fallston, Cleveland Co., North Carolina, at Pleasant Grove Cemetery.