Noonan
- County:
- Divide County
- County Seat:
- No
- Area (mi²):
- 0.292
- State:
- North Dakota
Noonan is a city located in Divide County, North Dakota. Noonan has a 2026 population of 134. Noonan is currently declining at a rate of -0.74% annually and its population has decreased by -2.9% since the most recent census, which recorded a population of 138 in 2020.