Roop's Mill is a historic grist mill complex located near Westminster, Carroll County, Maryland. The complex includes a three-story, brick and stone mill, dating from about 1795 and rebuilt in 1816; the David Roop House, an 1825 stone dwelling; a log cooper's shed; an early two-part bank barn; numerous farm sheds; a late-19th century iron suspension bridge; and a bank barn dated to the 1860s. The brick mill was constructed according to the designs of Oliver Evans. It was listed on the National Register of Historic Places in 2008.