John married Margaret Viola Logsdon on 26 Apr 1876 in Linn, Missouri, United States. Margaret (daughter of Edward Logsdon and Mary Ann Gough) was born on 2 Mar 1854 in Vermont, Fulton County, Illinois; died on 24 Aug 1915 in Ogden, Weber County, Utah. [Group Sheet] [Family Chart]

1. Mary Elizabeth Clark was born on 30 Mar 1878 in Missouri; died on 4 Jul 1960 in Idaho Falls, Bonneville, Idaho.
2. Leo John Clark was born on 27 Dec 1888 in St. Joseph, Missouri; died on 26 Apr 1921 in Ogden, Weber, Utah; was buried in Mountain View Cemetery in Pocatello, Bannock County Idaho.