Derby
- County:
- Sedgwick County
- County Seat:
- No
- Area (mi²):
- 11.108
- State:
- Kansas
Derby is a city located in Sedgwick County, Kansas. Derby has a 2026 population of 26,604. Derby is currently growing at a rate of 1.07% annually and its population has increased by 3.46% since the most recent census, which recorded a population of 25,715 in 2020.