Henry Oliver Walker (May 14, 1843 – January 14, 1929) was an American painter of figures and portraits best known for his mural decorations.

[1] His works include a series of paintings honoring various poets for the Library of Congress and decorations for public buildings such as the Appellate Court House in New York City, Bowdoin College in Maine, the Massachusetts State House, the Minnesota State Capitol, and the Court House in Newark, New Jersey.

[1] In 1879, he went Paris, France to study painting under Léon Bonnat at the École des Beaux-Arts.

After returning to the United States in 1882, he lived for a few years in Boston, then moved to New York and set up a studio there.

In Cornish he was part of the Cornish Art Colony that included such artists as Dewing, Augustus Saint-Gaudens, Maxfield Parrish, Louis St. Gaudens, Charles A. Platt, and Kenyon Cox.