Sandcastle Waterpark is a water park located in the Pittsburgh suburb of West Homestead.

The park contains sixteen water slides, several swimming pools, and a handful of other attractions.

Other attractions at Sandcastle include a "lazy river," a large swimming pool, Mon-Tsunami, a wave pool, and an area of water slides and water attractions designed specifically for children called Wet Willies.

Sandcastle previously offered a miniature golf course, a go-kart track and beach volleyball courts; they were replaced by the Mon Tsunami wave pool (1999) and Dragon's Den slide (2010) respectively, although the sand pit leftover from the courts was repurposed a sandbox for children.

The water park is located down the road from the Waterfront, a large shopping complex with stores, restaurants, and movie theaters.