Petersburg is a city in Nelson County, North Dakota, United States.

Politician Martin N. Johnson and neighbor Levi H. Peterson owned land along the Great Northern Railway and decided to form a townsite.

Peterson won the coin flip, selecting the name Petersburg, presumably after himself.

36.6% of all households were made up of individuals, and 23.2% had someone living alone who was 65 years of age or older.

About 4.6% of families and 6.1% of the population were below the poverty line, including none of those under the age of eighteen and 11.9% of those 65 or over.

Amtrak’s Empire Builder, which operates between Seattle/Portland and Chicago, passes through the town on BNSF tracks, but makes no stop.

The nearest station is located in Devils Lake, 43 miles (69 km) to the northwest.