Petersburg (in St. Clair County, IL) Populated Place Profile

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Petersburg: Basic Facts & Information

Petersburg is a populated place LOCATED WITHIN the City of O'Fallon. In turn, the City of O'Fallon is located within St. Clair County.

Petersburg is located at latitude 38.592 and longitude -89.921. The elevation of Petersburg is 548 feet above mean sea level.

Since Petersburg is located within the City of O'Fallon, all of the census and demographic data for residents of Petersburg are included as part of the information reported for City of O'Fallon in the "Profile" tab above.

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