| Equestrian Portrait of Philip III | |
| Other Language 1: | Spanish |
| Other Title 1: | Felipe III a caballo |
| Artist: | Diego Velázquez |
| Year: | 1634–1635 |
| Medium: | Oil on canvas |
| Height Metric: | 300 |
| Width Metric: | 212 |
| Metric Unit: | cm |
| Imperial Unit: | in |
| Museum: | Museo del Prado |
| City: | Madrid |
The Equestrian Portrait of Philip III is a portrait of Philip III of Spain on horseback by Diego Velázquez. It was painted in 1634/35, more than a decade after the subject's death in 1621, as part of a series of paintings of the royal family. Intended to be displayed in the Hall of Realms, originally a wing of the Buen Retiro Palace in Madrid, it is now in the Prado Museum.
The portrait was commissioned by Philip III's son Philip IV. It was painted for the decoration of the Hall of Realms of the Buen Retiro Palace, along with the equestrian portraits of Phillip III's wife, Queen Margaret, Philip IV, Isabella of France, and Prince Baltasar Carlos. The studio of the artist is believed to have made a significant contribution to the painting.