What is the largest province in Spain?

The largest province in Spain is Cáceres. It is located in the autonomous community of Extremadura in western Spain. With an area of 19,868 km2, Cáceres is the largest province by land area in Spain and the second most populous province in Extremadura. The province is home to the cities of Cáceres, Plasencia, and Trujillo, as well as several other towns and villages.