Alosno is a town and municipality in the province of Huelva, in the Andalusia region of Spain. According to the 2025 municipal register, it has a population of 3,988 inhabitants.
The Filon Sur Mine, located within the municipality, is a notable source of fine specimens of the mineral goethite. Nearby lies Cabezo Juré, an archaeological site of copper smelting dated to more than 4,500 years ago.