Data / Rankings / Population density / US counties

US counties by population density

New York County had the highest population density of 3144 counties in 2020, at 28,747.8 inhabitants per km². Yukon-Koyukuk Census Area had the lowest, at 0 inhabitants per km². The median was 17.2 inhabitants per km² and the figure for the United States was 36.2 inhabitants per km². Source: the U.S. Census Bureau.

Highest28,747.8New York County
Lowest0Yukon-Koyukuk Census Area
Median17.23144 counties
United States36.2History

Top 40 counties, 2020

CSVChart (SVG)

New York CountyNew York County: 28,747.8 inhabitants per km²28,747.8Kings CountyKings County: 15,150.2 inhabitants per km²15,150.2Bronx CountyBronx County: 13,368.8 inhabitants per km²13,368.8Queens CountyQueens County: 8,471.6 inhabitants per km²8,471.6San Francisco CountySan Francisco County: 7,237.7 inhabitants per km²7,237.7Hudson CountyHudson County: 6,033.2 inhabitants per km²6,033.2Suffolk CountySuffolk County: 5,244.8 inhabitants per km²5,244.8Philadelphia CountyPhiladelphia County: 4,601.1 inhabitants per km²4,601.1District of ColumbiaDistrict of Columbia: 4,238 inhabitants per km²4,238Alexandria cityAlexandria city: 4,114.2 inhabitants per km²4,114.2Arlington CountyArlington County: 3,546.9 inhabitants per km²3,546.9Richmond CountyRichmond County: 3,323.4 inhabitants per km²3,323.4Baltimore cityBaltimore city: 2,782.2 inhabitants per km²2,782.2Falls Church cityFalls Church city: 2,769.1 inhabitants per km²2,769.1Essex CountyEssex County: 2,633.4 inhabitants per km²2,633.4Manassas Park cityManassas Park city: 2,190.2 inhabitants per km²2,190.2Union CountyUnion County: 2,154.6 inhabitants per km²2,154.6Cook CountyCook County: 2,150.7 inhabitants per km²2,150.7Nassau CountyNassau County: 1,887.4 inhabitants per km²1,887.4St. Louis citySt. Louis city: 1,878.7 inhabitants per km²1,878.7Denver CountyDenver County: 1,810.2 inhabitants per km²1,810.2Charlottesville cityCharlottesville city: 1,749.9 inhabitants per km²1,749.9Norfolk cityNorfolk city: 1,723.8 inhabitants per km²1,723.8Manassas cityManassas city: 1,674.6 inhabitants per km²1,674.6Bergen CountyBergen County: 1,582 inhabitants per km²1,582Orange CountyOrange County: 1,550.8 inhabitants per km²1,550.8Milwaukee CountyMilwaukee County: 1,500.9 inhabitants per km²1,500.9Fairfax cityFairfax city: 1,495.6 inhabitants per km²1,495.6Richmond cityRichmond city: 1,462.1 inhabitants per km²1,462.1Ramsey CountyRamsey County: 1,399.1 inhabitants per km²1,399.1Pinellas CountyPinellas County: 1,353.3 inhabitants per km²1,353.3Delaware CountyDelaware County: 1,211 inhabitants per km²1,211Winchester cityWinchester city: 1,176.1 inhabitants per km²1,176.1Dallas CountyDallas County: 1,154.5 inhabitants per km²1,154.5Harrisonburg cityHarrisonburg city: 1,151.4 inhabitants per km²1,151.4Portsmouth cityPortsmouth city: 1,136.1 inhabitants per km²1,136.1Fairfax CountyFairfax County: 1,134.1 inhabitants per km²1,134.1Lexington cityLexington city: 1,130.5 inhabitants per km²1,130.5Wayne CountyWayne County: 1,129.3 inhabitants per km²1,129.3DeKalb CountyDeKalb County: 1,103 inhabitants per km²1,103
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2020
inhabitants per km²
1New York County28,747.8
2Kings County15,150.2
3Bronx County13,368.8
4Queens County8,471.6
5San Francisco County7,237.7
6Hudson County6,033.2
7Suffolk County5,244.8
8Philadelphia County4,601.1
9District of Columbia4,238
10Alexandria city4,114.2
11Arlington County3,546.9
12Richmond County3,323.4
13Baltimore city2,782.2
14Falls Church city2,769.1
15Essex County2,633.4
16Manassas Park city2,190.2
17Union County2,154.6
18Cook County2,150.7
19Nassau County1,887.4
20St. Louis city1,878.7
21Denver County1,810.2
22Charlottesville city1,749.9
23Norfolk city1,723.8
24Manassas city1,674.6
25Bergen County1,582
26Orange County1,550.8
27Milwaukee County1,500.9
28Fairfax city1,495.6
29Richmond city1,462.1
30Ramsey County1,399.1
31Pinellas County1,353.3
32Delaware County1,211
33Winchester city1,176.1
34Dallas County1,154.5
35Harrisonburg city1,151.4
36Portsmouth city1,136.1
37Fairfax County1,134.1
38Lexington city1,130.5
39Wayne County1,129.3
40DeKalb County1,103
41DuPage County1,096.8
42Passaic County1,085.2
43Middlesex County1,075.1
44Harris County1,070.6
45Cuyahoga County1,066.2
46Newport News city1,041
47Fredericksburg city1,034.4
48Hampton city1,029.9
49Franklin County960.5
50Marion County952.3
51Los Angeles County950.6
52Tarrant County944.2
53Colonial Heights city932.6
54Camden County912.6
55Roanoke city907.1
56Westchester County897.5
57Greater Bridgeport Planning Region893.3
58Hennepin County893.2
59Alameda County879.8
60Orleans Parish872.9
61Broomfield County872.3
62Cobb County871.1
63Gwinnett County858.2
64Hopewell city858.1
65Montgomery County830.7
66Mecklenburg County823
67Clayton County815.7
68Bristol County812.5
69Jefferson County793.7
70Hamilton County790.8
71Fulton County783.7
72Prince George's County772.5
73Middlesex County766.8
74St. Louis County761.8
75Rockland County750.1
76Multnomah County731.2
77Virginia Beach city725.2
78Macomb County709
79Norfolk County705.4
80Douglas County692.2
81Montgomery County685
82Salem city675.5
83Williamsburg city667.8
84Mercer County664.7
85Allegheny County661
86San Mateo County656.4
87Honolulu County650.6
88Suffolk County645.1
89Radford city643.1
90Sacramento County634.6
91Essex County633.3
92Contra Costa County628.1
93Bexar County627.3
94Broward County623.8
95Lynchburg city623.5
96Providence County622.3
97Lake County620.8
98Orange County612.1
99Salt Lake County608.9
100South Central Connecticut Planning Region593.4
101Seminole County588.4
102Santa Clara County577.6
103Waynesboro city574.6
104Petersburg city567.6
105Oakland County566.4
106Jefferson Parish564.3
107Prince William County556.1
108Hillsborough County553.9
109Henrico County553.4
110Anne Arundel County552.4
111Baltimore County550.6
112Davidson County549.2
113Miami-Dade County547.8
114Monmouth County529.7
115Wake County523.1
116Bristol city519.5
117New Castle County517.1
118Howard County512
119Duval County505.1
120Summit County505.1
121Travis County503.5
122Staunton city500.3
123Johnson County498.2
124Collin County493.4
125Lucas County489.7
126Shelby County476.9
127Martinsville city475
128Jackson County458.2
129New Hanover County454.6
130Tulsa County454.2
131Montgomery County449.5
132Western Connecticut Planning Region448.9
133Monroe County445.7
134Somerset County440.6
135Fayette County438.8
136Oklahoma County434.8
137Forsyth County434.7
138Durham County433
139Davis County432.3
140Wyandotte County430.1
141Morris County425.6
142Naugatuck Valley Planning Region420
143Lehigh County418.7
144Clarke County416.2
145King County415
146Bucks County412.8
147Kenton County407.5
148Covington city405.8
149Bristol County402.6
150Denton County402.1
151Buena Vista city396.8
152Ocean County392.2
153Lake County391.4
154Kent County390.3
155East Baton Rouge Parish386.5
156Lake County386.1
157Danville city384
158Kane County383.9
159Franklin city380
160Lee County378.4
161Fort Bend County371.9
162Muscogee County369.2
163Knox County364.9
164Gloucester County362.8
165Capitol Planning Region362.3
166Forsyth County362
167Galveston County357.8
168Erie County352.7
169Lafayette Parish347.8
170Hamilton County341.7
171Anoka County333.5
172Chesterfield County333.1
173Polk County332.4
174Emporia city331.8
175Rockwall County331.4
176El Paso County330.1
177Northampton County326.6
178Butler County323.5
179Newport County322.3
180Guilford County322
181Will County321.9
182Washington County320.4
183Arapahoe County317.1
184Loudoun County316.4
185Galax city314.8
186Poquoson city313.6
187Clark County310.4
188Sarpy County310.1
189Plymouth County309.8
190Sarasota County302.9
191San Diego County302.7
192Dakota County302.3
193Kent County299.3
194Vanderburgh County298.3
195Schenectady County297.8
196Jefferson County294.5
197Palm Beach County293.7
198Henry County293
199Pasco County292.8
200Hampden County290.1
201Waukesha County286.2
202Chesapeake city284.8
203St. Charles County280.1
204Douglas County279.2
205Rockdale County278.3
206Chester County275.1
207Kitsap County269.5
208Washington County269.3
209Chatham County263.3
210Hamilton County262
211Greenville County259
212York County259
213Stark County251.5
214Gaston County248.1
215Lorain County246.8
216Clay County246.7
217Genesee County246
218Cherokee County245.9
219Richmond County245.9
220Bibb County243.2
221Cabarrus County242.9
222Kenosha County240.3
223Campbell County237.7
224Fayette County237
225Onondaga County235.8
226Santa Cruz County235.7
227Jefferson County234.4
228Warren County233.9
229Albany County232.1
230Montgomery County231.7
231Brevard County231.6
232Harford County230.7
233St. Joseph County230
234Racine County229.9
235Stafford County226.9
236Allen County226.9
237Lancaster County226.1
238Bernalillo County225
239St. Lucie County223.8
240Barnstable County223.4
241Burlington County223
242Worcester County219
243San Joaquin County216.5
244Hidalgo County214.5
245Winnebago County214.4
246Boone County214
247Rutherford County213.9
248Mahoning County213.9
249Pierce County213.8
250Williamson County213

Showing the top 250 of 3144. The CSV download has every row.

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

New York County, with 28,747.8 inhabitants per km² in 2020, according to the U.S. Census Bureau.

Which county has the lowest population density?

Yukon-Koyukuk Census Area, with 0 inhabitants per km² in 2020.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

US counties: more rankings