Kosciusko
- County:
- Attala County
- County Seat:
- Yes
- Area (mi²):
- 7.541
- State:
- Mississippi
Kosciusko is a city located in Attala County, Mississippi. Kosciusko has a 2026 population of 6,774. It is also the county seat of Attala County. Kosciusko is currently declining at a rate of -1.04% annually and its population has decreased by -4.42% since the most recent census, which recorded a population of 7,087 in 2020.