Henry McCauley Farm is a historic farm complex in Hagerstown, Washington County, Maryland, United States. The house is a four-bay, two-story brick dwelling built between 1830 and 1850, with a four bay ell and a small one-story shed-roofed addition. The walls are set on low limestone foundations. The property also includes a large stone and frame bank barn and a metal windmill for pumping water. It is one of two historic farm complexes located in Ditto Farm Regional Park, along with Ditto Knolls. The Henry McCauley Farm was listed on the National Register of Historic Places in 1976.