Petersburg
- County:
- Nelson County
- County Seat:
- No
- Area (mi²):
- 46.26
- State:
- North Dakota
Petersburg is located in Nelson County, North Dakota. Petersburg has a 2025 population of 46 . Petersburg is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 46 in 2020.
The median age in Petersburg is 42.3 years: 8.8 years for males, and 0 years for females. For every 100 females there are 280.0 males.