Mifflin-Marim Agricultural Complex is a historic home located at Dover, Kent County, Delaware. The complex consists of four contributing buildings and two contributing structures. The main house dates to about 1820, and is a two-story, five-bay, center hall plan brick dwelling. The L-shaped dwelling has a low two-story rear wing. The house and its associated agricultural outbuildings are reflective of 18th century building techniques. They are a barn, stable, frame corn crib and granary on brick piers and a series of small sheds and utility buildings.

It was added to the National Register of Historic Places in 1984.