Derby
- County:
- Lucas County
- County Seat:
- No
- Area (mi²):
- 0.255
- State:
- Iowa
Derby is a city located in Lucas County, Iowa. Derby has a 2026 population of 89. Derby is currently declining at a rate of 0% annually and its population has increased by 1.14% since the most recent census, which recorded a population of 88 in 2020.
The median household income in Derby is $56,250 with a poverty rate of 35.45%. The median age in Derby is 41.8 years: 43.9 years for males, and 34.4 years for females. For every 100 females there are 66.7 males.