Johannes Georg Smith Harder, known as Hans Harder (12 August 1792 – 25 November 1873) was a Danish painter and drawing master.
He studied at the Royal Danish Academy of Fine Arts.
With funding from the Fonden ad usus publicos, he conducted a study trip to Munich, Italy and Austria during 1825–29.
In 1830, he was unanimously elected as a member of the Art Academy.
He remained a drawing teacher at Sorø Academy for most of his life, resigning in 1862.