Vincennes
- County:
- Knox County
- County Seat:
- Yes
- Area (mi²):
- 7.455
- State:
- Indiana
Vincennes is a city located in Knox County, Indiana. Vincennes has a 2026 population of 16,506. It is also the county seat of Knox County. Vincennes is currently declining at a rate of -0.41% annually and its population has decreased by -1.5% since the most recent census, which recorded a population of 16,758 in 2020.