Reservoir Park is the oldest and largest municipal public park in Harrisburg, Pennsylvania, and occupies approximately 85 acres (340,000 m2) in the Allison Hill neighborhood of the city.

[2] Reservoir Park is also home to the National Civil War Museum and provides the setting for many of Harrisburg's most popular outdoor festivals and performances.

The park is part of the Capital Area Greenbelt, a 20-mile (32 km) greenway surrounding portions of the city.

City leaders recognized the spot as a wonderful vantage point to view the State Capitol, the Susquehanna River valley and the Blue Mountains and, in 1890, officially established the area around the reservoir as a park.

It contains one underground thirty million gallon reservoir, and two 6 million gallon above ground reservoirs, which gravity-feed freshwater to the city's water system.