About an hour north of San Diego County is Greater Los Angeles, which is commonly referred to as the Southland. This five county area is massive; almost 4,900 square miles with a combined population of over 17,700,000 people according to a U.S. Census Bureau estimate in 2006. The borders extend from Ventura County to the north, Orange County to the south, the Pacific Ocean to the west, and the Inland Empire of San Bernardino and Riverside Counties to the east.