- New Jersey is the most densely populated state.
- New York is home to the most populous city in the country, and ranks 8th among the states in density.
- Despite a small population, Vermont has fairly average population density because of its small area.
- Idaho's population has increased rapidly in recent decades, but its population density is lower than other states.
- About half of the population of Alaska lives in the Anchorage metropolitan area.
- Puerto Rico is the fourth most densely populated of states and possessions of the U.S.