David G. Davison was born 10 March 1843 in Butler County, Ohio, United States to William Davison (1807-1893) and Clarissa Sithens (1809-1892) . He married Elmyra Cunningham (1842-) December 1863 . He married Nancy J. Groves (bef1872-) July 1872 in Crawford County, Illinois, United States. He married Jennie Lewis (1862-) .
David Davison moved to Clinton County, Indiana, in 1852. He was working as a cooper in Jefferson, Clinton County, Indiana, in 1861 when he enlisted in the Union Army.