Infanta Margarita Teresa in a Pink Dress is a 1660 oil on canvas portrait of Margaret Theresa of Spain by the Spanish painter Diego Velázquez, though his identification as its author is not considered secure.

Its subject was the royal most frequently portrayed by Velázquez, also appearing in his Las Meninas and Infanta Margarita Teresa in a Blue Dress.

Until the 19th century the painting was misidentified as a portrait of Infanta Maria Theresa of Spain, child of Philip IV of Spain's first marriage (with Elisabeth of France) and later wife of Louis XIV of France.

In an 1872 catalogue by the painter Pedro de Madrazo, then the Prado's director, it was still misidentified in this way.

Later research revealed that it actually is Margaret Theresa, child of Philip IV's second marriage to Mariana of Austria.