Lisboa Region is one of the seven NUTS II designated regions of Portugal, which includes two NUTS III subregions: Greater Lisbon and Peninsula of Setúbal. The region covers an area of 3001.95 km² (the smallest region on mainland Portugal) and includes a population of 2,815,851 inhabitants according to the 2011 census (the most populated region in Portugal), a density of 1039 inhabitants/km².