
New Hartford
- County:
- Butler County
- County Seat:
- No
- Area (mi²):
- 0.62
- State:
- Iowa
New Hartford is a city located in Butler County, Iowa. New Hartford has a 2025 population of 546. New Hartford is currently declining at a rate of -0.91% annually and its population has decreased by -4.38% since the most recent census, which recorded a population of 571 in 2020.
The average household income in New Hartford is $72,781 with a poverty rate of 17.48%. The median age in New Hartford is 37.3 years: 29.5 years for males, and 39 years for females.