Ash Hill, also known as Hitching Post Hill, is a historic two-story brick dwelling located on Rosemary Lane in Hyattsville, Prince George's County, Maryland. The house was built around 1840 by Robert Clark, an Englishman who sought the peace and quiet of the countryside as a contrast to the crowded city life Washington, D.C.

In 1875, the property was purchased by General Edward Fitzgerald Beale, a well-connected figure known for his influential social circle. Beale was a close personal friend of President U.S. Grant, who visited Ash Hill and even kept his two Arabian horses, Leopard and Linden, stabled at Ash Hill. Beale also entertained other prominent figures of the time, including President Grover Cleveland and the famous showman Buffalo Bill Cody.

The house is architecturally notable for its imposing presence, emphasized by its foot-thick brick walls and commanding hilltop location. A significant addition to the house is the massive pillared porch that wraps around three sides of the building, which was added by Admiral Chauncey Thomas after he purchased the property in 1895.

Ash Hill was listed on the National Register of Historic Places in 1977.

Media related to Ash Hill at Wikimedia Commons

• Ash Hill, Prince George's County, Inventory No.: PG:68-1, including photo in 2003, at Maryland Historical Trust website
• Historic American Buildings Survey (HABS) No. MD-976, "Hitching Post Hill, 3308 Rosemary Lane, Hyattsville, Prince George's County, MD", 6 photos, 3 data pages, 1 photo caption page