Infante Ferdinand of Portugal, Count of Flanders (Coimbra, March 24, 1188 – Noyon, July 27, 1233) is a Portuguese infante, fourth son of Portuguese King Sancho I and Dulce of Aragon.

Born in 1188, he is Count of Flanders by marriage to Countess Joan of Flanders, eldest daughter of Baldwin IX of Flanders.