Petersburg is a city in Grant County, West Virginia, United States.

[5] Petersburg was founded circa 1745 by Jacob Peterson, who owned the area's first merchandising store.

Located near Petersburg (but in Pendleton County) is the Old Judy Church (1836), listed on the National Register of Historic Places since 1976.

[8] According to the United States Census Bureau, the city has a total area of 1.62 square miles (4.20 km2), all of it land.

[9] The climate in this area has mild differences between highs and lows, and there is adequate rainfall year-round.

The most prominent of these is U.S. Route 220, which enters Petersburg from the direction of Franklin and exits eastward towards Moorefield.

Grant County Airport is located 1.2 miles southwest of the city center.

Grant Memorial Hospital serves three counties in the West Virginia Panhandle.