Petersburg is a city located in Michigan. With a 2020 population of 1,121, it is the 343rd largest city in Michigan and the 9860th largest city in the United States. Petersburg is currently declining at a rate of -0.27% annually and its population has decreased by -2.18% since the most recent census, which recorded a population of 1,146 in 2010. Petersburg reached it's highest population of 1,145 in 2010. Spanning over 0 miles, Petersburg has a population density of 2,322 people per square mile.
The average household income in Petersburg is $67,049 with a poverty rate of 8.60%. The median rental costs in recent years comes to $754 per month, and the median house value is $125,200. The median age in Petersburg is 38.2 years, 35.5 years for males, and 40.9 years for females. For every 100 females there are 97.0 males.