Historical Population Density by State: 1910–2020 Census Trends and Changes
U.S. population density rose from 26.0 people per square mile in 1910 to 93.8 in 2020, with the fastest growth in the South and West and persistent concentration along the Eastern Seaboard and Pacific Coast. State-level rankings show New Jersey and Rhode Island among the most densely populated states, while Alaska remains the least dense. This article examines decennial census data, state comparisons, and the factors behind a century of spatial change.
