Born on February 23, 1782, near Miller's Iron Works in
Augusta County,
Virginia, Campbell attended the common schools, taught school, then
read law in 1808. He was admitted to the bar and entered private practice in
West Union,
Ohio from 1808 to 1826. He was prosecutor for
Adams County, Ohio from 1809 to 1817. He was a
Justice of the Peace for
Tiffin Township, Adams County, Ohio from 1809 to 1815. He was a member of the
Ohio House of Representatives in 1810, and from 1815 to 1817. ==Congressional service==