It is on the east bank of the Patapsco River, opposite Ellicott City.

This historic district designation relates to the industrial operations of the Ellicott family from the 1770s through the mid-19th century.

It consists of the sites of historic buildings including: an 18th-century building, a section of an 18th-century mill incorporated in a 20th-century factory, a 19th-century tavern, 19th-century workers housing, and an 1859 Italianate villa built by John Ellicott.

Historically, these industrious mills were served by the major east–west route in Maryland during the early 19th century, the old National Pike.

This article about a Registered Historic Place in Baltimore County, Maryland is a stub.