Agüero is a village and a municipality located in the province of Huesca, Aragon, Spain. Its postal code is 22808. There are two churches in the village (Santiago and San Salvador). The 12th-century Santiago church is the main attraction in the village proper. There is also a small hotel in the village.

The Mallos de Agüero rock formations rise more than 200 m (660 ft) above the village, giving it a picturesque look. The Mallos are popular with mountain climbers and abseilers.