Jens Juel (12 May 1745 – 27 December 1802) was a Danish painter, primarily known for his many portraits, of which the largest collection is on display at Frederiksborg Castle.
In 1772 he left Copenhagen, moving to Rome where he stayed for four years together with other Danish artists, including Nicolai Abildgaard. From Rome, he moved to Paris, at the time a center of portrait painting. In 1777 he moved on to Geneva, where he stayed for two years at the home of his friend Charles Bonnet in the company of other Danish artists, including etcher Johann Friderich Clemens. In Geneva, Juel soon earned himself a reputation as an excellent artist, and he painted many portraits. Through Bonnet, who had become an honorary member of the Danish Academy, his reputation reached Denmark. After a brief stay in Hamburg, where he met and painted a portrait of the celebrated poet Friedrich Gottlieb Klopstock, author of The Messiah, he returned to Copenhagen in 1780. Here he painted portraits for the royal house, nobility, and the well-to-do, as well as landscapes and genre paintings.
On 4 April 1782, he was unanimously elected to be a member of the Danish Academy by Mandelberg, Weidenhaupt, and Abildgaard. He became the director of the Academy in 1795.