
Hartley
- County:
- O'Brien County
- County Seat:
- No
- Area (mi²):
- 1.33
- State:
- Iowa
Hartley is a city located in O'Brien County, Iowa. Hartley has a 2025 population of 1,550. Hartley is currently declining at a rate of -0.64% annually and its population has decreased by -3.13% since the most recent census, which recorded a population of 1,600 in 2020.
The average household income in Hartley is $62,502 with a poverty rate of 15.64%. The median age in Hartley is 48.1 years: 42.4 years for males, and 53.5 years for females.