Henry Inman was an American portrait, genre, and landscape painter.
He was born at Utica, N.Y. to English immigrant parents who were among the first settlers of Utica. His family moved to New York City in 1812.
Beginning in 1814 and continuing for the next seven years, he was an apprentice pupil of John Wesley Jarvis in New York City, along with John Quidor.

He was the first vice president of the National Academy of Design. He excelled in portrait painting, but was less careful in genre pictures. Among his landscapes are Rydal Falls, England, October Afternoon, and Ruins of Brambletye. His genre subjects include Rip Van Winkle, The News Boy, and Boyhood of Washington. His portraits include those of Henry Rutgers and Fitz-Greene Halleck in the New York Historical Society. He also painted portraits of Angelica Singleton Van Buren, Bishop White, Chief Justices Marshall and Nelson, Jacob Barker, William Wirt, Audubon, DeWitt Clinton, Richard Varick, Martin Van Buren, Francis L. Hawks, and William H. Seward.

Thomas L. McKenney assigned Inman, who was an accomplished lithographer, the task of copying more than a hundred oil paintings of Native American leaders by Charles Bird King to translate into a printed book, the History of the Indian Tribes of North America. The oil paintings are now in the collections of White House, the Joslyn Art Museum, and the Amon Carter Museum of American Art, among others. In the Metropolitan Museum, New York, are his Martin Van Buren, The Young Fisherman, and William C. Maccready as William Tell.

During a year spent in England in 1844–1845, he painted Wordsworth, Macaulay, John Chambers, Sir William Stewart, Baronet of Blair and other celebrities.

At the time of his death, he was engaged on a series of historical pictures for the Capitol at Washington. He was also president of National Academy of Design.

Among his pupils was the portraitist and still life painter Thomas Wightman.