Julius Francis (16 September 1641 – 30 September 1689) was duke of Saxe-Lauenburg between 1666 and 1689.
He was a son of Duke Julius Henry and his third wife Anna Magdalena of Lobkowicz (1606 – 1668), daughter of Baron William the Younger Popel of Lobkowicz.
He was officially known as Julius Franz von Sachsen, Engern und Westfalen.