Hillside Cemetery is located on Mulberry Street in Middletown, New York, United States. Opened in 1861, it was designed in the rural cemetery style by Calvert Vaux and Frederick Law Olmsted, later noted for their collaboration on Central Park. There are several thousand graves, some with excellent examples of 19th-century funerary art. Many of Middletown's prominent citizens of the late 19th century were buried there, including three Civil War winners of the Medal of Honor and one former congressman. In 1994 it was added to the National Register of Historic Places.