Us Population 2024 By City Population. The 2024 population density in the united states is 38 people per km 2 (98 people per mi 2), calculated on a total land area of 9,147,420 km2 (3,531,837 sq. Of the european cities, istanbul is the most.
The united states 2024 population is estimated at 345,426,571 people at mid year. Los angeles ( 3.8m ) and chicago ( 2.6m ) follow, and southern cities houston ( 2.3m ) and phoenix ( 1.7m ) round out the top five.