George K. Crozer Mansion, also known as Netherleigh, was a historic mansion located at Upland, Delaware County, Pennsylvania. It was an Italianate style mansion built in 1869. The mansion was destroyed by fire in June 1990, and subsequently demolished.
George K. Crozer was the son of John Price Crozer, who founded a milling business on nearby Chester Creek and founded the modern borough of Upland.
The mansion was added to the National Register of Historic Places in 1973.