County Maps US

The most densely populated counties in the United States

New York County, New York 73,478 per sq mi

Which US county is the most densely populated?

What this list shows

  • 3,144 of the 3,144 US counties and county-equivalents have a published figure for population density.
  • Virginia accounts for 26 of the top 100, ahead of New York with 9 and New Jersey with 8.
  • The top 100 is not made up only of counties. It includes 1 county-equivalent, 26 independent cities, 1 planning region, and 1 parish. County-equivalents are ranked alongside counties here, and the type column says which is which.

The top 100

The most densely populated counties in the United States. Sortable on any column.
RankCountyStateTypeDensity
1New York CountyNew YorkCounty73,478 per sq mi
2Kings CountyNew YorkCounty38,254 per sq mi
3Bronx CountyNew YorkCounty33,325 per sq mi
4Queens CountyNew YorkCounty21,690 per sq mi
5San Francisco CountyCaliforniaCounty17,695 per sq mi
6Hudson CountyNew JerseyCounty15,912 per sq mi
7Suffolk CountyMassachusettsCounty13,593 per sq mi
8Philadelphia CountyPennsylvaniaCounty11,720 per sq mi
9District of ColumbiaDistrict of ColumbiaCounty-equivalent11,348 per sq mi
10Alexandria cityVirginiaIndependent city10,757 per sq mi
11Arlington CountyVirginiaCounty9,383 per sq mi
12Richmond CountyNew YorkCounty8,715 per sq mi
13Falls Church cityVirginiaIndependent city7,409 per sq mi
14Essex CountyNew JerseyCounty7,109 per sq mi
15Baltimore cityMarylandIndependent city7,042 per sq mi
16Union CountyNew JerseyCounty5,857 per sq mi
17Cook CountyIllinoisCounty5,497 per sq mi
18Manassas Park cityVirginiaIndependent city5,474 per sq mi
19Nassau CountyNew YorkCounty4,916 per sq mi
20Denver CountyColoradoCounty4,838 per sq mi
21St. Louis cityMissouriIndependent city4,507 per sq mi
22Manassas cityVirginiaIndependent city4,504 per sq mi
23Norfolk cityVirginiaIndependent city4,336 per sq mi
24Charlottesville cityVirginiaIndependent city4,333 per sq mi
25Fairfax cityVirginiaIndependent city4,290 per sq mi
26Bergen CountyNew JerseyCounty4,197 per sq mi
27Orange CountyCaliforniaCounty3,970 per sq mi
28Richmond cityVirginiaIndependent city3,959 per sq mi
29Milwaukee CountyWisconsinCounty3,828 per sq mi
30Ramsey CountyMinnesotaCounty3,557 per sq mi
31Pinellas CountyFloridaCounty3,465 per sq mi
32Delaware CountyPennsylvaniaCounty3,161 per sq mi
33Lexington cityVirginiaIndependent city3,109 per sq mi
34Winchester cityVirginiaIndependent city3,075 per sq mi
35Dallas CountyTexasCounty3,048 per sq mi
36Fairfax CountyVirginiaCounty2,987 per sq mi
37Harris CountyTexasCounty2,955 per sq mi
38Harrisonburg cityVirginiaIndependent city2,933 per sq mi
39Fredericksburg cityVirginiaIndependent city2,908 per sq mi
40Portsmouth cityVirginiaIndependent city2,906 per sq mi
41DeKalb CountyGeorgiaCounty2,893 per sq mi
42Wayne CountyMichiganCounty2,891 per sq mi
43Middlesex CountyNew JerseyCounty2,856 per sq mi
44Passaic CountyNew JerseyCounty2,856 per sq mi
45DuPage CountyIllinoisCounty2,849 per sq mi
46Cuyahoga CountyOhioCounty2,696 per sq mi
47Hampton cityVirginiaIndependent city2,668 per sq mi
48Newport News cityVirginiaIndependent city2,656 per sq mi
49Tarrant CountyTexasCounty2,598 per sq mi
50Franklin CountyOhioCounty2,557 per sq mi
51Marion CountyIndianaCounty2,506 per sq mi
52Colonial Heights cityVirginiaIndependent city2,492 per sq mi
53Camden CountyNew JerseyCounty2,420 per sq mi
54Greater Bridgeport Planning RegionConnecticutPlanning Region2,409 per sq mi
55Broomfield CountyColoradoCounty2,402 per sq mi
56Los Angeles CountyCaliforniaCounty2,388 per sq mi
57Gwinnett CountyGeorgiaCounty2,361 per sq mi
58Westchester CountyNew YorkCounty2,358 per sq mi
59Mecklenburg CountyNorth CarolinaCounty2,356 per sq mi
60Cobb CountyGeorgiaCounty2,335 per sq mi
61Roanoke cityVirginiaIndependent city2,331 per sq mi
62Hennepin CountyMinnesotaCounty2,319 per sq mi
63Hopewell cityVirginiaIndependent city2,247 per sq mi
64Alameda CountyCaliforniaCounty2,219 per sq mi
65Montgomery CountyMarylandCounty2,179 per sq mi
66Orleans ParishLouisianaParish2,136 per sq mi
67Clayton CountyGeorgiaCounty2,099 per sq mi
68Jefferson CountyKentuckyCounty2,088 per sq mi
69Fulton CountyGeorgiaCounty2,086 per sq mi
70Bristol CountyRhode IslandCounty2,072 per sq mi
71Hamilton CountyOhioCounty2,068 per sq mi
72Rockland CountyNew YorkCounty2,058 per sq mi
73Middlesex CountyMassachusettsCounty2,042 per sq mi
74Prince George's CountyMarylandCounty2,011 per sq mi
75St. Louis CountyMissouriCounty1,949 per sq mi
76Norfolk CountyMassachusettsCounty1,868 per sq mi
77Douglas CountyNebraskaCounty1,857 per sq mi
78Virginia Beach cityVirginiaIndependent city1,854 per sq mi
79Macomb CountyMichiganCounty1,849 per sq mi
80Multnomah CountyOregonCounty1,845 per sq mi
81Montgomery CountyPennsylvaniaCounty1,817 per sq mi
82Radford cityVirginiaIndependent city1,782 per sq mi
83Mercer CountyNew JerseyCounty1,779 per sq mi
84Salem cityVirginiaIndependent city1,778 per sq mi
85Williamsburg cityVirginiaIndependent city1,775 per sq mi
86Bexar CountyTexasCounty1,741 per sq mi
87Suffolk CountyNew YorkCounty1,697 per sq mi
88Orange CountyFloridaCounty1,692 per sq mi
89Essex CountyMassachusettsCounty1,678 per sq mi
90Allegheny CountyPennsylvaniaCounty1,678 per sq mi
91Sacramento CountyCaliforniaCounty1,677 per sq mi
92Broward CountyFloridaCounty1,674 per sq mi
93Lynchburg cityVirginiaIndependent city1,663 per sq mi
94San Mateo CountyCaliforniaCounty1,658 per sq mi
95Providence CountyRhode IslandCounty1,656 per sq mi
96Honolulu CountyHawaiiCounty1,646 per sq mi
97Contra Costa CountyCaliforniaCounty1,632 per sq mi
98Salt Lake CountyUtahCounty1,622 per sq mi
99Lake CountyIllinoisCounty1,621 per sq mi
100Waynesboro cityVirginiaIndependent city1,600 per sq mi

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Density is computed here, not published by the Census Bureau. It divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

This is the top 100. See the complete table of all 3,144 counties.

Other rankings

Rebuilt from source data 30 August 2026. How these figures are produced.