Queseria La Leze is a cheese producer located in Ilarduia, Álava, in the Basque Country of Spain. The company specializes in producing artisanal cheeses, focusing on local sheep's milk varieties.

Their cheeses are crafted using traditional methods and the milk of Latxa and Carranzana sheep, which are native to the Basque region. One of their notable products is the Idiazabal cheese, which has a Protected Designation of Origin status, certifying its regional authenticity and traditional production methods.