Louisburg
- County:
- Miami County
- County Seat:
- No
- Area (mi²):
- 4.879
- State:
- Kansas
Louisburg is a city located in Miami County, Kansas. Louisburg has a 2026 population of 5,266. Louisburg is currently growing at a rate of 1.8% annually and its population has increased by 5.85% since the most recent census, which recorded a population of 4,975 in 2020.