Sunbury, Pennsylvania

Sunbury ( ) is a city in and the county seat of Northumberland County, Pennsylvania, United States. It lies on the east bank of the Susquehanna River at the confluence of the river's North and West branches, about 50 miles (80 km) north of Harrisburg. As of the 2020 United States census, Sunbury had a population of 9,719. It is the principal city of the Sunbury micropolitan statistical area, which comprises Northumberland County and is part of the larger Bloomsburg–Berwick–Sunbury combined statistical area.

The site of Sunbury was long occupied by Shamokin, one of the largest and most important Native American settlements in colonial Pennsylvania, and later by Fort Augusta, the principal British frontier outpost on the upper Susquehanna during the French and Indian War. The town of Sunbury was laid out in 1772 as the seat of the newly created Northumberland County and named after Sunbury-on-Thames, England. In 1883, Thomas Edison's company built the world's first successful central electric lighting station in Sunbury, and the City Hotel—the first building lit by the system—was later renamed the Hotel Edison in his honor.

Sunbury is the headquarters of the supermarket chain Weis Markets, founded in the city in 1912. Much of the older city is included in the Sunbury Historic District, which is listed on the National Register of Historic Places.