United States of America (USA) population density is 33.9 people per square kilometer as of January 2016. Density of population is calculated as permanently settled population of United States of America (USA) divided by total area of the country. Total area is the sum of land and water areas within international boundaries and coastlines of United States of America (USA). The total area of United States of America (USA) is 9 632 030 km2 according to the United Nations Statistics Division .