Harrison was the son of Chester and Rhoda Weeks Kingsley. He married Caroline R Taylor on 12 July 1838. Her parents were Samuel and Lorinda Taylor. From "The History of Rutland County Vermont with Illustrations and Biographical Sketches of Some of Its Prominent Men and Pioneers:" The first grist-mill at East Clarendon was built for Nathaniel Crary, who sold it to Chester Kingsley about 1825; he sold it to Harvey and Harrison Kingsley in 1839 (Chester's sons). Fourteen years later Harrison purchased his partner's interest. The mill was rebuilt while in the hands of the two Kingsleys, and is now owned by Harrison Kingsley. The elder Kingsley also built a carding-mill here, and a saw-mill, which were carried off in the great flood." Harrison and Caroline had three children: Samuel Taylor, Althea/Alathea and John H. Samuel married S Amelia Todd and they are buried here. Althea married Lauraman C Squire and they are buried in this cemetery. John H married Lizzie Ann Wyman and they are also buried in this cemetery.

Harrison secondly married Lucy (Hewitt) Blood, on 10 September 1894 in Clarendon, Rutland County, VT, when he was 81 years old.

Obituary: Rutland Daily Herald, Friday Morning September 27, 1901, last page: Died: In East Claendon, September 26, Harrison Kingsley aged 88 years. Funeral Saturday at 2 o'clock at the house.
Rutland Daily Herald, Monday morning September 30, 1901, last page: Local: The funeral of Harrison Kingsey, who died Thursday morning at the home of his son, John Kingsley, at East Clarendon, was held at the house Saturday afternoon at 2 o'clock, Rev A H Plumb Jr., officiating. The bearers were John Kingsley, L Squares [sic][Squire] of Clarendon, N P Kingsley (Nahum) and L G Kingsley (Levi Gleason) of this city. The burial was in Evergreen Cemetery.