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