Montgomery County Jail and Sheriff's Residence is a historic jail and sheriff's residence located at Crawfordsville, Montgomery County, Indiana. It was built in 1882 in two sections, and is a 2+1⁄2-story, red brick and limestone building in a combination of Italianate, Gothic Revival, and Romanesque Revival style architecture. The jail is a "rotary jail"; it is the only example of this type in Indiana and one of two left in the United States. The building houses a local history and prison museum.