Petersburg is located in southeast Michigan. Petersburg is part of Monroe County. Petersburg has 0.48 square miles of land area and has no water area. As of 2010-2014, the total Petersburg population is 1,395, which has grown 20.57% since 2000. The population growth rate is much higher than the state average rate of -0.50% and is much higher than the national average rate of 11.61%. Petersburg median household income is $49,952 in 2010-2014 and has grown by 11.35% since 2000. The income growth rate is higher than the state average rate of 9.90% and is much lower than the national average rate of 27.36%. Petersburg median house value is $98,500 in 2010-2014 and has grown by -6.19% since 2000. The house value growth rate is much lower than the state average rate of 3.98% and is much lower than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Petersburg is better than the state average in quality. The Petersburg area code is 734.