John Joseph Hennessy was an Irish-born prelate of the Roman Catholic Church. He served as the first bishop of the new Diocese of Wichita in Kansas from 1888 until his death in 1920.
- Occupation
- Catholic priest, Catholic bishop
- Position held
- diocesan bishop, apostolic administrator
- Citizenship
- United Kingdom of Great Britain and Ireland, United States
- Born
- July 19, 1847
- Died
- July 13, 1920
