Joseph W Barr
- Category : 1918-births
- Type : MGP
- Profile : 1/3 - Investigating / Martyr
- Definition : Single
- Incarnation Cross : RAX Laws 4
American businessman and politician, who served as the United States Secretary of the Treasury from 21 December 1968 until 20 January 1969 in President Lyndon B. Johnson's cabinet.
Barr died of a heart attack in Playa del Carmen, Mexico, on 23 February 1996, aged 78.