Guaza de Campos is a municipality located in the province of Palencia, Castile and León, Spain. It is in the plain known as the Tierra de Cam…Guaza de Campos is a municipality located in the province of Palencia, Castile and León, Spain. It is in the plain known as the Tierra de Campos. According to the 2004 census, the municipality had a population of 68 inhabitants.