Petersburg
- County:
- Nelson County
- County Seat:
- No
- Area (mi²):
- 1.028
- State:
- North Dakota
Petersburg is a city located in Nelson County, North Dakota. Petersburg has a 2026 population of 159. Petersburg is currently declining at a rate of -0.62% annually and its population has decreased by -0.62% since the most recent census, which recorded a population of 160 in 2020.
The median household income in Petersburg is $72,083 with a poverty rate of 2.5%. The median age in Petersburg is 61.5 years: 64.7 years for males, and 38.3 years for females. For every 100 females there are 73.9 males.