Juliette Wytsman (née Trullemans) was a Belgian impressionist painter. She was married to painter Rodolphe Wytsman. Her paintings are in the collections of several museums in Belgium.

Wytsman was born as Juliette Trullemans on 14 July 1866 in Brussels in Belgium.

She first studied under Henri Hendrickx at the Bischoffsheim Institute in Brussels. She later worked in the workshop of Jean Capeinick [nl] 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.

Wytsman died on 8 March 1925, at the age of 58, in Ixelles in Belgium.