Main city: Petersburg
Timezone: Eastern
Phone type: Landline
Operator: Phone Michigan

Petersburg, a city in Monroe County in the U.S. state of Michigan. The population was 1,146 at the 2010 census. Petersburg is named after Richard Peters, who sold the land necessary to found the town in 1836. It was originally called Summerfield and Peters was its first postmaster, but it was later named Petersburgh in honor of Peters and was eventually shortened to Petersburg. Petersburg is served by Summerfield Schools. ^source

Area code 734, created in 1997, covers southern portions of southeast Michigan, including all of Washtenaw and Monroe counties, and southern and western portions of Wayne County. This area includes Ann Arbor, Ypsilanti, Saline, Milan, Belleville, Garden City, Wayne, Westland, Livonia, Canton, Pinckney, Plymouth, Plymouth Township, Romulus, Monroe, Bedford, Taylor (south of Goddard Road), as well other Downriver communities. Area code 734 also covers the west side of the city of Inkster. ^source