Frederick, Hereditary Prince of Saxony (15 March 1504, Dresden – 26 February 1539, Dresden) was a German nobleman and member of the Albertine branch of the House of Wettin.
Mentally disabled, he was the second of only four of their ten children to survive to adulthood and, on the death of his elder brother John in 1537, succeeded him as hereditary prince of the Duchy of Saxony.
In Dresden on 27 January 1539, he married the Catholic Elisabeth (ca.
On the day of his death, Frederick's father released him from his obligation to do homage: George had hoped that "his obedient son [ie Frederick] would leave behind him so many seeds that his [ie George's] lands might have a ruling lord".
Henry vetoed the idea and, soon afterwards, inherited the Duchy of Saxony from George when the latter died without surviving male issue in April 1539, less than two months after Frederick.