Locust Grove is a National Historic Landmark estate located on US 9 in the Town of Poughkeepsie, New York. The 180-acre park-like estate includes homes, a carriage house, ice house, trails, a flower garden, and vegetable garden, and it overlooks the Hudson River from a bluff. The property includes a home designed by architect Alexander Jackson Davis for Samuel F. B. Morse, the inventor of the telegraph. An Italianate style mansion, it was completed in 1851.