Data / Rankings / Population density / US counties

US counties by population density

New York County had the highest population density of 3144 counties in 2021, at 26,749.8 inhabitants per km². Yukon-Koyukuk Census Area had the lowest, at 0 inhabitants per km². The median was 17.3 inhabitants per km² and the figure for the United States was 36.3 inhabitants per km². Source: the U.S. Census Bureau.

Highest26,749.8New York County
Lowest0Yukon-Koyukuk Census Area
Median17.33144 counties
United States36.3History

Top 40 counties, 2021

CSVChart (SVG)

New York CountyNew York County: 26,749.8 inhabitants per km²26,749.8Kings CountyKings County: 14,662.2 inhabitants per km²14,662.2Bronx CountyBronx County: 13,000.5 inhabitants per km²13,000.5Queens CountyQueens County: 8,269.1 inhabitants per km²8,269.1San Francisco CountySan Francisco County: 6,750 inhabitants per km²6,750Hudson CountyHudson County: 5,877.6 inhabitants per km²5,877.6Suffolk CountySuffolk County: 5,153.5 inhabitants per km²5,153.5Philadelphia CountyPhiladelphia County: 4,570.9 inhabitants per km²4,570.9District of ColumbiaDistrict of Columbia: 4,229.7 inhabitants per km²4,229.7Alexandria cityAlexandria city: 4,010 inhabitants per km²4,010Arlington CountyArlington County: 3,467.6 inhabitants per km²3,467.6Richmond CountyRichmond County: 3,316.5 inhabitants per km²3,316.5Baltimore cityBaltimore city: 2,749.8 inhabitants per km²2,749.8Falls Church cityFalls Church city: 2,738.9 inhabitants per km²2,738.9Essex CountyEssex County: 2,616.7 inhabitants per km²2,616.7Manassas Park cityManassas Park city: 2,181.4 inhabitants per km²2,181.4Union CountyUnion County: 2,151 inhabitants per km²2,151Cook CountyCook County: 2,119.1 inhabitants per km²2,119.1Nassau CountyNassau County: 1,888.5 inhabitants per km²1,888.5St. Louis citySt. Louis city: 1,836.5 inhabitants per km²1,836.5Denver CountyDenver County: 1,796.3 inhabitants per km²1,796.3Charlottesville cityCharlottesville city: 1,723.1 inhabitants per km²1,723.1Norfolk cityNorfolk city: 1,703.8 inhabitants per km²1,703.8Manassas cityManassas city: 1,678 inhabitants per km²1,678Bergen CountyBergen County: 1,584.5 inhabitants per km²1,584.5Orange CountyOrange County: 1,538.5 inhabitants per km²1,538.5Fairfax cityFairfax city: 1,507.2 inhabitants per km²1,507.2Milwaukee CountyMilwaukee County: 1,478.6 inhabitants per km²1,478.6Richmond cityRichmond city: 1,464.1 inhabitants per km²1,464.1Ramsey CountyRamsey County: 1,377.8 inhabitants per km²1,377.8Pinellas CountyPinellas County: 1,353.6 inhabitants per km²1,353.6Delaware CountyDelaware County: 1,212.4 inhabitants per km²1,212.4Winchester cityWinchester city: 1,179.7 inhabitants per km²1,179.7Lexington cityLexington city: 1,150.5 inhabitants per km²1,150.5Harrisonburg cityHarrisonburg city: 1,145.9 inhabitants per km²1,145.9Dallas CountyDallas County: 1,145.3 inhabitants per km²1,145.3Portsmouth cityPortsmouth city: 1,134.3 inhabitants per km²1,134.3Fairfax CountyFairfax County: 1,128.2 inhabitants per km²1,128.2Wayne CountyWayne County: 1,120.4 inhabitants per km²1,120.4DeKalb CountyDeKalb County: 1,095.9 inhabitants per km²1,095.9
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021
inhabitants per km²		Change on 2020
1New York County26,749.8-7%
2Kings County14,662.2-3.2%
3Bronx County13,000.5-2.8%
4Queens County8,269.1-2.4%
5San Francisco County6,750-6.7%
6Hudson County5,877.6-2.6%
7Suffolk County5,153.5-1.7%
8Philadelphia County4,570.9-0.7%
9District of Columbia4,229.7-0.2%
10Alexandria city4,010-2.5%
11Arlington County3,467.6-2.2%
12Richmond County3,316.5-0.2%
13Baltimore city2,749.8-1.2%
14Falls Church city2,738.9-1.1%
15Essex County2,616.7-0.6%
16Manassas Park city2,181.4-0.4%
17Union County2,151-0.2%
18Cook County2,119.1-1.5%
19Nassau County1,888.5+0.1%
20St. Louis city1,836.5-2.2%
21Denver County1,796.3-0.8%
22Charlottesville city1,723.1-1.5%
23Norfolk city1,703.8-1.2%
24Manassas city1,678+0.2%
25Bergen County1,584.5+0.2%
26Orange County1,538.5-0.8%
27Fairfax city1,507.2+0.8%
28Milwaukee County1,478.6-1.5%
29Richmond city1,464.1+0.1%
30Ramsey County1,377.8-1.5%
31Pinellas County1,353.60%
32Delaware County1,212.4+0.1%
33Winchester city1,179.7+0.3%
34Lexington city1,150.5+1.8%
35Harrisonburg city1,145.9-0.5%
36Dallas County1,145.3-0.8%
37Portsmouth city1,134.3-0.2%
38Fairfax County1,128.2-0.5%
39Wayne County1,120.4-0.8%
40DeKalb County1,095.9-0.6%
41DuPage County1,092.3-0.4%
42Middlesex County1,076+0.1%
43Passaic County1,074.8-1%
44Harris County1,071.1+0.1%
45Cuyahoga County1,053-1.2%
46Fredericksburg city1,051.1+1.6%
47Hampton city1,033.6+0.4%
48Newport News city1,033.4-0.7%
49Franklin County955.2-0.5%
50Tarrant County950.6+0.7%
51Marion County947.1-0.5%
52Colonial Heights city934.5+0.2%
53Los Angeles County932.9-1.9%
54Camden County914.6+0.2%
55Greater Bridgeport Planning Region900.2+0.8%
56Roanoke city896.8-1.1%
57Westchester County896.4-0.1%
58Hennepin County883.2-1.1%
59Broomfield County883.2+1.2%
60Cobb County871.8+0.1%
61Gwinnett County864.2+0.7%
62Alameda County860.9-2.2%
63Hopewell city860.7+0.3%
64Orleans Parish859.5-1.5%
65Mecklenburg County829.8+0.8%
66Montgomery County826.7-0.5%
67Clayton County814.3-0.2%
68Bristol County812.60%
69Jefferson County788.5-0.7%
70Hamilton County787.7-0.4%
71Fulton County779.1-0.6%
72Prince George's County765.3-0.9%
73Middlesex County762.3-0.6%
74St. Louis County758.4-0.4%
75Rockland County755.5+0.7%
76Virginia Beach city723.6-0.2%
77Multnomah County721.2-1.4%
78Macomb County707.1-0.3%
79Norfolk County706.7+0.2%
80Douglas County692.40%
81Montgomery County691+0.9%
82Salem city676.2+0.1%
83Williamsburg city667.80%
84Allegheny County658.7-0.3%
85Radford city657.9+2.3%
86Mercer County657.3-1.1%
87Suffolk County650.1+0.8%
88Honolulu County645.4-0.8%
89San Mateo County636.4-3%
90Sacramento County635.5+0.1%
91Essex County632.9-0.1%
92Bexar County632.3+0.8%
93Contra Costa County627.1-0.2%
94Lynchburg city624.9+0.2%
95Broward County621.4-0.4%
96Providence County621.4-0.1%
97Lake County621.1+0.1%
98Orange County610.6-0.2%
99Salt Lake County608.7-0%
100South Central Connecticut Planning Region598.2+0.8%
101Seminole County587.8-0.1%
102Waynesboro city583.3+1.5%
103Petersburg city568.3+0.1%
104Oakland County566.70%
105Santa Clara County563-2.5%
106Hillsborough County560.9+1.3%
107Prince William County559.1+0.5%
108Jefferson Parish557.3-1.2%
109Anne Arundel County554.6+0.4%
110Henrico County552.8-0.1%
111Baltimore County548.5-0.4%
112Miami-Dade County542.6-0.9%
113Davidson County537.9-2.1%
114Wake County533.3+2%
115Monmouth County532.6+0.5%
116New Castle County518.1+0.2%
117Howard County515.8+0.7%
118Bristol city512.8-1.3%
119Collin County511.4+3.6%
120Travis County508.4+1%
121Duval County507.8+0.5%
122Summit County502.6-0.5%
123Johnson County501.4+0.6%
124Staunton city498.3-0.4%
125Lucas County487.9-0.4%
126Martinsville city477+0.4%
127Shelby County473.6-0.7%
128New Hanover County462.1+1.6%
129Jackson County458.5+0.1%
130Tulsa County456.5+0.5%
131Western Connecticut Planning Region452.8+0.9%
132Montgomery County448.6-0.2%
133Forsyth County448.2+3.1%
134Monroe County443.5-0.5%
135Somerset County442.6+0.5%
136Durham County438.6+1.3%
137Davis County436.8+1.1%
138Fayette County435.9-0.7%
139Oklahoma County435.8+0.2%
140Morris County427.3+0.4%
141Wyandotte County426.1-0.9%
142Naugatuck Valley Planning Region422.9+0.7%
143Lehigh County420.2+0.4%
144Clarke County418.3+0.5%
145Denton County415.2+3.3%
146Bucks County413.8+0.2%
147King County411.2-0.9%
148Kenton County408.4+0.2%
149Bristol County404.7+0.5%
150Covington city403.8-0.5%
151Ocean County399+1.8%
152Buena Vista city396.80%
153Kent County392+0.4%
154Lee County391+3.3%
155Lake County390.8-0.1%
156Lake County386.20%
157Fort Bend County386+3.8%
158East Baton Rouge Parish384.6-0.5%
159Kane County384.1+0.1%
160Danville city381.4-0.7%
161Franklin city380.3+0.1%
162Knox County369.1+1.2%
163Muscogee County365.9-0.9%
164Gloucester County365.3+0.7%
165Capitol Planning Region365.3+0.8%
166Forsyth County365.1+0.8%
167Galveston County361.9+1.2%
168Rockwall County354+6.8%
169Erie County352.80%
170Lafayette Parish351.8+1.1%
171Hamilton County350+2.4%
172Chesterfield County338.3+1.6%
173Anoka County336.3+0.8%
174Polk County335.7+1%
175Northampton County332.3+1.7%
176El Paso County330.5+0.1%
177Emporia city327.9-1.2%
178Guilford County324+0.6%
179Will County323.3+0.4%
180Newport County322.5+0.1%
181Washington County321.1+0.2%
182Loudoun County321.1+1.5%
183Butler County320.6-0.9%
184Arapahoe County317.9+0.3%
185Poquoson city317.5+1.3%
186Clark County314.9+1.5%
187Sarpy County314.6+1.4%
188Plymouth County312.4+0.8%
189Galax city312-0.9%
190Sarasota County311.6+2.9%
191Dakota County303.9+0.5%
192Pasco County302.7+3.4%
193Schenectady County301.4+1.2%
194San Diego County300.1-0.9%
195Kent County299.5+0.1%
196Vanderburgh County297.9-0.1%
197Henry County297.1+1.4%
198Palm Beach County295.6+0.6%
199Jefferson County293.5-0.4%
200Hampden County289.5-0.2%
201Waukesha County287.4+0.4%
202Chesapeake city287.3+0.9%
203St. Charles County282.9+1%
204Douglas County281.4+0.8%
205Rockdale County279.2+0.3%
206Chester County278.4+1.2%
207Washington County273.6+1.6%
208Kitsap County270.4+0.3%
209Chatham County264+0.3%
210Hamilton County263.3+0.5%
211Greenville County262.7+1.4%
212York County262.3+1.3%
213Cherokee County251.9+2.4%
214Gaston County251.2+1.2%
215Stark County250.9-0.2%
216Clay County248.5+0.7%
217Cabarrus County247.8+2%
218Lorain County247.2+0.2%
219Genesee County245.3-0.3%
220Richmond County244.7-0.5%
221Bibb County241.8-0.6%
222Montgomery County241.2+4.1%
223Fayette County239.5+1.1%
224Kenosha County239.3-0.4%
225Warren County237.3+1.4%
226Campbell County236.9-0.3%
227Brevard County235.1+1.5%
228Onondaga County234-0.8%
229Albany County233.5+0.6%
230Jefferson County232.6-0.7%
231St. Lucie County232.5+3.9%
232Harford County232.5+0.8%
233Stafford County232.4+2.4%
234St. Joseph County229.6-0.2%
235Allen County228.6+0.8%
236Racine County228.5-0.6%
237Barnstable County227.7+1.9%
238Lancaster County227.6+0.7%
239Santa Cruz County226.5-3.9%
240Bernalillo County224.5-0.2%
241Burlington County224.4+0.6%
242Williamson County223.1+4.7%
243Worcester County220.4+0.6%
244Rutherford County218.9+2.3%
245San Joaquin County218.5+1%
246James City County217.1+2%
247Hidalgo County216.1+0.8%
248Boone County215.9+0.9%
249Manatee County215.1+3%
250Paulding County214.8+2.5%

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 26,749.8 inhabitants per km² in 2021, according to the U.S. Census Bureau.

Which county has the lowest population density?

Yukon-Koyukuk Census Area, with 0 inhabitants per km² in 2021.

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