| Rank |
County |
Population Density |
| 1 |
New York County, New York
|
69,467.5
|
| 2 |
Kings County, New York
|
35,369.1
|
| 3 |
Bronx County, New York
|
32,903.6
|
| 4 |
Queens County, New York
|
20,553.6
|
| 5 |
San Francisco County, California
|
17,179.1
|
| 6 |
Hudson County, New Jersey
|
13,731.4
|
| 7 |
Suffolk County, Massachusetts
|
12,415.7
|
| 8 |
Philadelphia County, Pennsylvania
|
11,379.5
|
| 9 |
District of Columbia, District Of Columbia
|
9,856.6
|
| 10 |
Alexandria city, Virginia
|
9,314.3
|
| 11 |
Richmond County, New York
|
8,030.3
|
| 12 |
Arlington County, Virginia
|
7,993.6
|
| 13 |
Baltimore city, Maryland
|
7,671.5
|
| 14 |
Essex County, New Jersey
|
6,211.5
|
| 15 |
Falls Church city, Virginia
|
6,169.1
|
| 16 |
Manassas Park city, Virginia
|
5,632.6
|
| 17 |
Cook County, Illinois
|
5,495.1
|
| 18 |
Union County, New Jersey
|
5,216.1
|
| 19 |
St Louis city, Missouri
|
5,157.5
|
| 20 |
Nassau County, New York
|
4,704.8
|
| 21 |
Norfolk city, Virginia
|
4,486.4
|
| 22 |
Charlottesville city, Virginia
|
4,246.4
|
| 23 |
Milwaukee County, Wisconsin
|
3,926
|
| 24 |
Denver County, Colorado
|
3,922.6
|
| 25 |
Bergen County, New Jersey
|
3,884.5
|
| 26 |
Manassas city, Virginia
|
3,827.6
|
| 27 |
Orange County, California
|
3,807.7
|
| 28 |
Fairfax city, Virginia
|
3,616.8
|
| 29 |
Richmond city, Virginia
|
3,414.7
|
| 30 |
Pinellas County, Florida
|
3,347.5
|
| 31 |
Ramsey County, Minnesota
|
3,341.7
|
| 32 |
Delaware County, Pennsylvania
|
3,040.5
|
| 33 |
Wayne County, Michigan
|
2,974.4
|
| 34 |
Portsmouth city, Virginia
|
2,838.8
|
| 35 |
Winchester city, Virginia
|
2,838
|
| 36 |
Lexington city, Virginia
|
2,820.2
|
| 37 |
Harrisonburg city, Virginia
|
2,808.2
|
| 38 |
Cuyahoga County, Ohio
|
2,800
|
| 39 |
DuPage County, Illinois
|
2,799.8
|
| 40 |
Fairfax County, Virginia
|
2,766.8
|
| 41 |
Dallas County, Texas
|
2,718
|
| 42 |
Passaic County, New Jersey
|
2,715.3
|
| 43 |
Hampton city, Virginia
|
2,673.2
|
| 44 |
Newport News city, Virginia
|
2,630
|
| 45 |
Middlesex County, New Jersey
|
2,621.6
|
| 46 |
DeKalb County, Georgia
|
2,585.7
|
| 47 |
Los Angeles County, California
|
2,419.6
|
| 48 |
Harris County, Texas
|
2,402.4
|
| 49 |
Fredericksburg city, Virginia
|
2,326.2
|
| 50 |
Camden County, New Jersey
|
2,321.5
|
| 51 |
Colonial Heights city, Virginia
|
2,315.3
|
| 52 |
Roanoke city, Virginia
|
2,279.8
|
| 53 |
Marion County, Indiana
|
2,279.6
|
| 54 |
Westchester County, New York
|
2,204.7
|
| 55 |
Hopewell city, Virginia
|
2,198
|
| 56 |
Franklin County, Ohio
|
2,186.1
|
| 57 |
Tarrant County, Texas
|
2,094.7
|
| 58 |
Hennepin County, Minnesota
|
2,081.7
|
| 59 |
Bristol County, Rhode Island
|
2,064
|
| 60 |
Alameda County, California
|
2,043.6
|
| 61 |
Orleans Parish, Louisiana
|
2,029.4
|
| 62 |
Cobb County, Georgia
|
2,026.4
|
| 63 |
Montgomery County, Maryland
|
1,978.2
|
| 64 |
Hamilton County, Ohio
|
1,976.7
|
| 65 |
St Louis County, Missouri
|
1,967.2
|
| 66 |
Jefferson County, Kentucky
|
1,948.1
|
| 67 |
Gwinnett County, Georgia
|
1,871.2
|
| 68 |
Middlesex County, Massachusetts
|
1,837.9
|
| 69 |
Clayton County, Georgia
|
1,832.5
|
| 70 |
Rockland County, New York
|
1,795.9
|
| 71 |
Prince Georges County, Maryland
|
1,788.8
|
| 72 |
Virginia Beach city, Virginia
|
1,758.9
|
| 73 |
Mecklenburg County, North Carolina
|
1,755.5
|
| 74 |
Macomb County, Michigan
|
1,754.9
|
| 75 |
Fulton County, Georgia
|
1,748
|
| 76 |
Salem city, Virginia
|
1,717.9
|
| 77 |
Multnomah County, Oregon
|
1,704.9
|
| 78 |
Norfolk County, Massachusetts
|
1,693.6
|
| 79 |
Broomfield County, Colorado
|
1,691.9
|
| 80 |
Allegheny County, Pennsylvania
|
1,675.6
|
| 81 |
Radford city, Virginia
|
1,662.1
|
| 82 |
Montgomery County, Pennsylvania
|
1,655.9
|
| 83 |
Suffolk County, New York
|
1,637.4
|
| 84 |
Mercer County, New Jersey
|
1,632.2
|
| 85 |
San Mateo County, California
|
1,602.2
|
| 86 |
Honolulu County, Hawaii
|
1,586.7
|
| 87 |
Lake County, Illinois
|
1,585.6
|
| 88 |
Douglas County, Nebraska
|
1,574.4
|
| 89 |
Williamsburg city, Virginia
|
1,559.3
|
| 90 |
Lynchburg city, Virginia
|
1,538.2
|
| 91 |
Providence County, Rhode Island
|
1,530.3
|
| 92 |
Essex County, Massachusetts
|
1,508.8
|
| 93 |
Sacramento County, California
|
1,470.8
|
| 94 |
Fairfield County, Connecticut
|
1,467.2
|
| 95 |
Contra Costa County, California
|
1,465.2
|
| 96 |
Jefferson Parish, Louisiana
|
1,463.1
|
| 97 |
Broward County, Florida
|
1,444.9
|
| 98 |
New Haven County, Connecticut
|
1,426.7
|
| 99 |
Petersburg city, Virginia
|
1,413.7
|
| 100 |
Waynesboro city, Virginia
|
1,396.8
|