Francisco Herrera the Younger ("el Mozo"; 1622 – 25 August 1685) was a Spanish painter and architect.
For six years the younger Herrera devoted himself to the study of architecture, perspective, and the antique, his aim being fresco painting.
He is said to have been vain, suspicious, hot-tempered, and jealous; at any rate he resented his subordinate post and went to Madrid about 1661 (Cean Bermúdez).
Before leaving his native city he painted two large pictures for the cathedral and a "St. Francis" for the chapel of this saint.
In Madrid he painted a great Triumph of St. Hermengild for the church of the Carmelite friars, and a group of frescoes in San Felipe el Real which was appreciated by Philip IV of Spain, who commissioned him the painting of the dome of the chapel of Our Lady of Atocha, and thereafter made him painter to the king and superintendent of royal buildings.