Villalonso is a municipality located in the province of Zamora, Castile and León, Spain. According to the 2004 census (INE), the municipality has a population of 116 inhabitants.In 1147 Osorio Martínez granted a fuero to Villalonso with the approval of Alfonso VII. The village in turn was required to make an annual payment in kind of half a sheep, ten loaves of bread, some barley, and some must.