Villelongue (French pronunciation: [vil.lɔ̃ɡ]; Occitan: Vilalonca) is a commune in the Hautes-Pyrénées department in south-western France.

[3] Villelongue is situated on the flank of the Hautacam mountain, around a stream called the Ruisseau d'Isaby, and descends to the Gave de Gavarnie torrent.

It consists of a main village with a smaller hamlet above called Ortiac.

The woods above Ortiac conceal the Abbey of Saint-Orens, now in ruins.

The name is said to derive from a Latin villa (i.e. a large farm) dating from late antiquity, situated in the lower part of the modern village, in an area known as "Las Longas".