Horatio Greenough (September 6, 1805 - December 18, 1852) was an American sculptor.

Greenough studied in Rome from 1826; he became influenced by Bertel Thorvaldsen whom he greatly admired.

In 1832, he received an order from the Congress of the United States for a large statue of George Washington for the Capitol Rotund. When completed, this work caused much controversy: the classical style did not conform with American taste. The statue was displayed in various localities - today it can be seen at the National Museum of American History, Smithsonian Institution, Washington D.C.