Alexander Campbell (1779 – November 5, 1857) was a National Republican politician from Ohio.

Born in Frederick County, Virginia, Campbell moved to eastern Tennessee and then to Kentucky with his parents.

After studying medicine at Transylvania University, Campbell moved to Ohio in 1803, settling in Adams County a year later.

[1] An early anti-slavery campaigner, he had been unsuccessful in his candidacy for the U.S. Senate in 1808, but won a special election to the state's other seat a few months later and served from 1809 to 1813.

[2] Ohio Presidential elector in 1836 for William Henry Harrison.