Louis I of Bar was a French bishop of the 15th century and the de jure Duke of Bar from 1415 to 1430, ruling from the 1420s alongside his grand-nephew René of Anjou.
- Occupation
- Catholic priest, Catholic bishop
- Position held
- Roman Catholic Bishop of Poitiers, Roman Catholic Bishop of Verdun, cardinal, bishop of Langres
- Citizenship
- France
- Died
- June 23, 1430