Ranking of US Counties By Population Density from Census 2020
Updated on October 17, 2023.
According to the data from the US 2020 Census, as at April 2020, among all US counties, New York County, NY had the highest population density per square mile (74.78K people per sqr mile), followed by Kings County, NY (39.44K people per sqr mile), and Bronx County, NY (34.92K people per sqr mile).
The chart below shows the top 10 US counties with high population density, and the table below shows the ranking of the top 500 US counties.
You can see links at the bottom of the page for the ranking of counties by population density for each state.
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Related Topics: US Census 2020 Topic List.
Data Source: US Census Bureau, 2020 Census.
Ranking of US Counties By Population Density from Census 2020
Rank | County | Population Density |
|---|---|---|
| 1 | New York County, NY | 74,780.68 |
| 2 | Kings County, NY | 39,438.01 |
| 3 | Bronx County, NY | 34,920.30 |
| 4 | Queens County, NY | 22,124.48 |
| 5 | San Francisco County, CA | 18,629.03 |
| 6 | Hudson County, NJ | 15,691.66 |
| 7 | Suffolk County, MA | 13,697.57 |
| 8 | Philadelphia County, PA | 11,936.88 |
| 9 | Alexandria city, VA | 10,677.16 |
| 10 | Arlington County, VA | 9,179.49 |
| 11 | Richmond County, NY | 8,618.31 |
| 12 | Baltimore city, MD | 7,235.78 |
| 13 | Falls Church city, VA | 7,162.67 |
| 14 | Essex County, NJ | 6,850.39 |
| 15 | Manassas Park city, VA | 5,675.69 |
| 16 | Union County, NJ | 5,598.58 |
| 17 | Cook County, IL | 5,583.01 |
| 18 | Nassau County, NY | 4,905.34 |
| 19 | St. Louis city, MO | 4,884.96 |
| 20 | Denver County, CO | 4,674.31 |
| 21 | Charlottesville city, VA | 4,543.94 |
| 22 | Norfolk city, VA | 4,467.49 |
| 23 | Manassas city, VA | 4,345.42 |
| 24 | Bergen County, NJ | 4,105.59 |
| 25 | Orange County, CA | 4,019.71 |
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Ranking of Counties By Population Density for each US State from Census 2020
Use the following links to see the ranking of counties by population density for each of the following US states, based on data from the 2020 Census.