(August 10, 1848 - October 29, 1892) was an Irish-American painter known for his trompe l'oeil still lifes of ordinary objects.
Harnett was born in Clonakilty, County Cork, Ireland during the time of the potato famine. Shortly after his birth his family emigrated to America, settling in Philadelphia. Becoming a United States citizen in 1868, he made a living as a young man by engraving designs on table silver, while also taking night classes at the Pennsylvania Academy of the Fine Arts and later, in New York, at Cooper Union and at the National Academy of Design. His first known oil painting, a still life, dates from 1874.