Àríwá Amẹ́ríkà This North American density figure is based on a total land area of 23,090,542 km2 only, considerably less than the total combined land and water area of 24,709,000 km². List based on 2005 figures in Table A.12, World Urbanization Prospects: The 2005 Revision, Department of Economic and Social Affairs, Population Division, United Nations. Accessed on line January 1, 2008.