Christian Ridge Historic District is a national historic district located at Frankfort, Clinton County, Indiana. The district encompasses 430 contributing buildings and 2 contributing structures in a predominantly residential section of Frankfort. The district developed between about 1832 and 1952, and includes notable examples of Queen Anne, Colonial Revival, and Bungalow / American Craftsman style residential architecture. Located in the district is the separately listed Old Frankfort Stone High School. It was added to the National Register of Historic Places in 2003.