Arén (), in Catalan: Areny de Noguera (), or in Aragonese: Arén de Noguera, is a municipality located in the province of Huesca, Aragon, Spain. According to the 2018 census (INE), the municipality has a population of 318 inhabitants.
Villages
These include uninhabited villages: Former Arén municipality: Arén, Campamento de Arén, Sobrecastell, Berganuy, Claraválls, Puifel and Soliva. Former Cornudella de Baliera municipality (merged in 1965): Rivera de Vall, San Martín, El Sas, Casa Consistorial, Puimolar, L'Hostalet, Vilaplana, Soperún, Iscles, Suerri and Tresserra. Former Betesa municipality (merged in 1966): Betesa, Santa Eulalia, Los Molinos and Obís.
Trivia
The prehistoric crocodilian Arenysuchus was named after the municipality.