Robert of Alençon (1344–1377) was the son of Charles II of Alençon and Maria de La Cerda y Lara. He succeeded his father in 1346 as Count of Perche.
On 5 April 1374 he married Jeanne (d. aft. 20 January 1407), the daughter of John I, Viscount of Rohan. They had one son, Charles (1375–1377), who did not survive his father.