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

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

Villelongue has considerably expanded in recent years^[when?], as new tracts are open to development and as the road infrastructure have developed to allow inhabitants to commute to Lourdes and Tarbes.

Villelongue is unusual among local towns in having a latinate name, rather than a name deriving from Bigourdan (the local dialect of the Occitan language). 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".