Jonas Haas (1720–April 10, 1775) was a German-born Danish engraver.
Haas was born in Nuremberg in 1720. After spending several years working in Hamburg, he moved to Copenhagen with several other of his fellow artists, including Johan Martin Preisler and Carl Marcus Tuscher. In 1755, Haas was appointed official engraver for the University of Copenhagen.
In addition to a large amount of small portraits of contemporary and deceased people (including 15 Zealand bishops) he produced works for The Danish Atlas and vignettes of Frederic Louis Norden's travels. In Hamburg, he had married Anna Rosine Fritsch, the daughter of an acquaintance engraver, and they had four children. Three of his sons, Georg, Meno, and Peter were all engravers. Haas was buried at St. Peter's church cemetery. He is well represented in the Royal Collection.