St. Thomas Chapel, also known as St. Thomas Episcopal Church or St. Thomas Protestant Episcopal Chapel, is a historic building located at 7854 Church Street in Middletown, Frederick County, Virginia, United States. Built in the 1830s, regular services were held at the Episcopal church for almost 100 years. The building has been restored twice, once after being heavily damaged during the Civil War, and again in the 1960s. The church was added to the Virginia Landmarks Register (VLR) and the National Register of Historic Places (NRHP) in 1973.