Joseph Addison Alexander (24 April 1809 – 28 January 1860) was an American biblical scholar.He was born in Philadelphia, Pennsylvania, the third son of Archibald Alexander and brother to James Waddel Alexander and William Cowper Alexander.He graduated at the College of New Jersey (now Princeton University) in 1826, having devoted himself especially to the study of Hebrew and other languages, and from 1830 to 1833 was adjunct professor of ancient languages and literature there.