Leon Jastremski (July 17, 1843 - November 29, 1907) was a French-born Confederate soldier, journalist, and the three-term mayor of Baton Rouge, Louisiana. During his mayoralty, he fought and was instrumental in making Baton Rouge the state capital again. He was a co-founder of the United Confederate Veterans. He wrote political articles as a newspaper editor, including an editorial noted for its advocacy of racial segregation.