Us Population 2025 Per Square Mile. The population density in new york city is 29,302.66 people per square mile (11,313.81 people per square kilometer). New jersey, the most densely populated state, has 1,259 residents per square mile.

The nation’s most densely populated urban areas of. Globally, the average population density is 62 people per km² in 2025, but there are very large differences across countries.