Speedwell Forge Mansion, also known as Speedwell Forge Homestead, is a historic home located at Elizabeth Township, Lancaster County, Pennsylvania. The ironmaster's mansion was built about 1760, and is a 2½-story, four bay wide and two bay deep, brownstone and fieldstone dwelling in the Georgian style. It was expanded about 1795 with a Georgian/Federal style wing. Also on the property are a contributing stone summer kitchen, stone and frame workshop, stone paymaster's office c. 1795), and stone privy.

Elizabeth Township is a township in north central Lancaster County, Pennsylvania, United States. The population was 3,998 at the 2020 census.