Dunleith is an antebellum mansion in Natchez, Mississippi. The previous building, Routhland had been built by Job Routh in the 1790s and passed down to his daughter Mary Routh. When it was struck by lightning and burned down in 1855, her husband, General Charles G. Dahlgren rebuilt the home. It was sold for $30,000 in 1858 (equal to $820,500 today) to Alfred Vidal Davis who renamed it Dunleith. It was declared a National Historic Landmark in 1974.

The 12 room main house sits on 40 acres along with several outbuildings including a carriage house, a dairy barn, a poultry house, and a three story brick courtyard building that historically would have housed the kitchen & laundry. The main house has a Greek revival design and includes 26 Tuscan columns built of brick and stucco. There are porches around the entire building on the first and second floor. The first floor includes windows similar to those in Monticello which would roll up to become doorways.

Dunleith has been a historic house museum offering tours for hotel and restaurant guests as well as a historic inn since 1976. It is currently used as a hotel, restaurant and event venue. The historic inn has 22 guest rooms divided amongst the main house, courtyard and dairy barn buildings. Multiple venue spaces accommodate a variety of purposes, including weddings, conferences, tour groups and reunions. The Castle Restaurant & Pub located in the former carriage house - constructed circa 1790 - serves breakfast, lunch and dinner.