Juliette Wytsman (née Trullemans; 14 July 1866 – 8 March 1925) was a Belgian impressionist painter. She was married to painter Rodolphe Wytsman. Her paintings are in the collections of several museums in Belgium.
She first studied under Henri Hendrickx at the Bischoffsheim Institute in Brussels. She later worked in the workshop of Jean Capeinick in Ghent, where she specialized in the painting of flowers.
At Capeinick’s workshop, she met painter Rodolphe Wytsman. He was a founding member of Les XX and introduced her to this circle of avant-garde artists. They married in 1886 and moved to Linkebeek, near Brussels, in 1892. During World War I, they fled Belgium and lived in Rotterdam in the Netherlands.