Gaiman is a town in the Chubut Province of Patagonia, Argentina. It is situated in the lower valley of the Chubut River, about 15 kilometres (9 miles) west of the city of Trelew. According to the 2010 census conducted by INDEC, the town had a population of 6,627.
The town is a cultural and demographic centre of the main region of the Welsh settlement in Argentina, known in Welsh as Y Wladfa Gymreig. This Welsh heritage distinguishes Gaiman within the surrounding Patagonian region.