Marsh Creek State Park is a 1,705 acres (690 ha) Pennsylvania State Park in Upper Uwchlan and Wallace Townships, Chester County, Pennsylvania in the United States. The park is the location of the 535-acre (217 ha) man-made Marsh Creek Lake. The lake is a stop for migrating waterfowl. Marsh Creek State Park is 2 miles (3.2 km) west of Eagle on Pennsylvania Route 100.