Data / Rankings / Population / US counties

US counties by population

Los Angeles County had the highest population of 3144 counties in 2021, at 9.81 million. Loving County had the lowest, at 57. The median was 25,804 and the figure for the United States was 332.1 million. Source: the U.S. Census Bureau.

Highest9,810,478Los Angeles County
Lowest57Loving County
Median25,8043144 counties
United States332,100,166History

Top 40 counties, 2021

CSVChart (SVG)

Los Angeles CountyLos Angeles County: 9,810,478 persons9,810,478Cook CountyCook County: 5,186,249 persons5,186,249Harris CountyHarris County: 4,736,539 persons4,736,539Maricopa CountyMaricopa County: 4,500,059 persons4,500,059San Diego CountySan Diego County: 3,272,601 persons3,272,601Orange CountyOrange County: 3,160,780 persons3,160,780Miami-Dade CountyMiami-Dade County: 2,670,141 persons2,670,141Kings CountyKings County: 2,634,576 persons2,634,576Dallas CountyDallas County: 2,589,912 persons2,589,912Riverside CountyRiverside County: 2,454,767 persons2,454,767Queens CountyQueens County: 2,328,520 persons2,328,520Clark CountyClark County: 2,296,793 persons2,296,793King CountyKing County: 2,253,549 persons2,253,549San Bernardino CountySan Bernardino County: 2,190,129 persons2,190,129Tarrant CountyTarrant County: 2,130,671 persons2,130,671Bexar CountyBexar County: 2,031,426 persons2,031,426Broward CountyBroward County: 1,936,178 persons1,936,178Santa Clara CountySanta Clara County: 1,882,528 persons1,882,528Wayne CountyWayne County: 1,775,403 persons1,775,403Alameda CountyAlameda County: 1,644,275 persons1,644,275Middlesex CountyMiddlesex County: 1,614,929 persons1,614,929Philadelphia CountyPhiladelphia County: 1,590,224 persons1,590,224Sacramento CountySacramento County: 1,588,942 persons1,588,942New York CountyNew York County: 1,569,781 persons1,569,781Suffolk CountySuffolk County: 1,533,742 persons1,533,742Palm Beach CountyPalm Beach County: 1,503,906 persons1,503,906Hillsborough CountyHillsborough County: 1,484,907 persons1,484,907Orange CountyOrange County: 1,428,101 persons1,428,101Bronx CountyBronx County: 1,420,980 persons1,420,980Nassau CountyNassau County: 1,391,787 persons1,391,787Franklin CountyFranklin County: 1,317,228 persons1,317,228Travis CountyTravis County: 1,309,183 persons1,309,183Oakland CountyOakland County: 1,273,070 persons1,273,070Hennepin CountyHennepin County: 1,267,341 persons1,267,341Cuyahoga CountyCuyahoga County: 1,246,959 persons1,246,959Allegheny CountyAllegheny County: 1,245,335 persons1,245,335Salt Lake CountySalt Lake County: 1,186,648 persons1,186,648Contra Costa CountyContra Costa County: 1,164,370 persons1,164,370Wake CountyWake County: 1,153,051 persons1,153,051Fairfax CountyFairfax County: 1,142,546 persons1,142,546
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2021
persons		Change on 2020
1Los Angeles County9,810,478-1.9%
2Cook County5,186,249-1.5%
3Harris County4,736,539+0.1%
4Maricopa County4,500,059+1.2%
5San Diego County3,272,601-0.9%
6Orange County3,160,780-0.8%
7Miami-Dade County2,670,141-0.9%
8Kings County2,634,576-3.2%
9Dallas County2,589,912-0.8%
10Riverside County2,454,767+1.3%
11Queens County2,328,520-2.4%
12Clark County2,296,793+0.9%
13King County2,253,549-0.9%
14San Bernardino County2,190,129+0.3%
15Tarrant County2,130,671+0.7%
16Bexar County2,031,426+0.8%
17Broward County1,936,178-0.4%
18Santa Clara County1,882,528-2.5%
19Wayne County1,775,403-0.8%
20Alameda County1,644,275-2.2%
21Middlesex County1,614,929-0.6%
22Philadelphia County1,590,224-0.7%
23Sacramento County1,588,942+0.1%
24New York County1,569,781-7%
25Suffolk County1,533,742+0.8%
26Palm Beach County1,503,906+0.6%
27Hillsborough County1,484,907+1.3%
28Orange County1,428,101-0.2%
29Bronx County1,420,980-2.8%
30Nassau County1,391,787+0.1%
31Franklin County1,317,228-0.5%
32Travis County1,309,183+1%
33Oakland County1,273,0700%
34Hennepin County1,267,341-1.1%
35Cuyahoga County1,246,959-1.2%
36Allegheny County1,245,335-0.3%
37Salt Lake County1,186,648-0%
38Contra Costa County1,164,370-0.2%
39Wake County1,153,051+2%
40Fairfax County1,142,546-0.5%
41Mecklenburg County1,125,402+0.8%
42Collin County1,114,667+3.6%
43Fulton County1,063,193-0.6%
44Montgomery County1,055,869-0.5%
45Pima County1,049,271+0.4%
46Fresno County1,012,952+0.3%
47Honolulu County1,004,238-0.8%
48Duval County1,003,124+0.5%
49Westchester County1,000,252-0.1%
50St. Louis County998,850-0.4%
51Capitol Planning Region971,972+0.8%
52Marion County971,373-0.5%
53Gwinnett County965,016+0.7%
54Pinellas County959,9910%
55Prince George's County956,631-0.9%
56Bergen County955,376+0.2%
57Erie County952,7250%
58Denton County944,283+3.3%
59Pierce County927,786+0.5%
60DuPage County927,620-0.4%
61Milwaukee County924,701-1.5%
62Shelby County923,315-0.7%
63Kern County912,765+0.8%
64Hidalgo County879,576+0.8%
65Macomb County877,873-0.3%
66El Paso County867,558+0.1%
67Montgomery County864,286+0.9%
68Worcester County862,157+0.6%
69Middlesex County861,965+0.1%
70Fort Bend County861,857+3.8%
71Essex County854,485-0.6%
72Baltimore County850,038-0.4%
73Ventura County839,956-0.5%
74Snohomish County836,262+0.8%
75Hamilton County827,182-0.4%
76San Francisco County816,169-6.7%
77Essex County807,387-0.1%
78Multnomah County805,130-1.4%
79Oklahoma County800,107+0.2%
80Lee County791,169+3.3%
81San Joaquin County788,040+1%
82Jefferson County777,774-0.7%
83Suffolk County777,600-1.7%
84Cobb County767,036+0.1%
85DeKalb County759,708-0.6%
86Polk County755,803+3.5%
87Monroe County754,572-0.5%
88San Mateo County739,463-3%
89El Paso County738,405+0.6%
90Norfolk County724,970+0.2%
91Jackson County718,158+0.1%
92Lake County713,775+0.1%
93Denver County712,156-0.8%
94Hudson County703,186-2.6%
95Davidson County701,450-2.1%
96Will County699,920+0.4%
97Utah County686,039+3.4%
98Bernalillo County675,490-0.2%
99Tulsa County674,181+0.5%
100Jefferson County669,782-0.7%
101District of Columbia669,637-0.2%
102Kent County659,070+0.1%
103Providence County659,048-0.1%
104Arapahoe County657,020+0.3%
105Montgomery County650,934+4.1%
106Ocean County649,331+1.8%
107Bucks County647,792+0.2%
108Monmouth County645,873+0.5%
109Williamson County644,790+4.7%
110Western Connecticut Planning Region624,102+0.9%
111Brevard County618,088+1.5%
112Johnson County615,067+0.6%
113Washington County602,382+0.2%
114Anne Arundel County595,789+0.4%
115Douglas County585,6040%
116Pasco County585,365+3.4%
117Jefferson County581,002-0.4%
118Bristol County579,699+0.5%
119Delaware County577,178+0.1%
120Baltimore city576,503-1.2%
121Union County572,522-0.2%
122New Castle County572,097+0.2%
123South Central Connecticut Planning Region569,020+0.8%
124Volusia County566,620+1.9%
125Dane County561,805-0.1%
126Lancaster County556,420+0.7%
127Stanislaus County553,047-0.1%
128Spokane County545,511+0.8%
129Ramsey County543,343-1.5%
130Guilford County542,111+0.6%
131Chester County541,131+1.2%
132Summit County537,255-0.5%
133Montgomery County536,038-0.2%
134Greenville County534,789+1.4%
135Plymouth County532,772+0.8%
136Sedgwick County524,617-0%
137Camden County524,366+0.2%
138Adams County523,159+0.5%
139Passaic County518,136-1%
140Kane County516,626+0.1%
141Ada County513,092+3%
142Clark County512,654+1.5%
143Morris County510,240+0.4%
144Lake County499,0150%
145Polk County497,973+1%
146Washoe County494,481+1.4%
147Richmond County494,101-0.2%
148Knox County486,009+1.2%
149Prince William County485,482+0.5%
150Sonoma County484,827-0.8%
151Tulare County476,987+0.6%
152Onondaga County471,829-0.8%
153Seminole County471,040-0.1%
154Burlington County464,490+0.6%
155Hampden County462,628-0.2%
156York County459,306+0.6%
157Virginia Beach city458,644-0.2%
158East Baton Rouge Parish453,766-0.5%
159Naugatuck Valley Planning Region452,117+0.7%
160Solano County451,048-0.4%
161Pinal County449,128+4.4%
162Sarasota County448,847+2.9%
163Dakota County442,829+0.5%
164Monterey County439,062-0.3%
165Santa Barbara County437,529-2.4%
166Jefferson Parish434,258-1.2%
167Berks County429,671+0.2%
168Lucas County429,218-0.4%
169Loudoun County428,857+1.5%
170Hillsborough County424,484+0.4%
171Clackamas County423,877+0.3%
172Cameron County422,635+0.3%
173Richland County417,573+0.4%
174Charleston County414,662+1.2%
175Manatee County413,836+3%
176Mobile County413,299-0.3%
177Placer County413,038+1.7%
178St. Charles County410,568+1%
179Waukesha County409,199+0.4%
180Orange County405,133+1%
181Genesee County404,694-0.3%
182Osceola County404,048+3.3%
183Pulaski County398,104-0.3%
184Madison County396,748+1.6%
185Lake County396,400+2.6%
186Allen County389,023+0.8%
187Collier County387,411+2.7%
188Butler County387,409-0.9%
189Lane County386,175+0.5%
190Forsyth County385,808+0.8%
191Marion County385,203+2.1%
192Mercer County382,139-1.1%
193Bell County380,747+2.2%
194Brazoria County379,221+1.5%
195Orleans Parish377,506-1.5%
196Lehigh County375,852+0.4%
197Stark County373,565-0.2%
198Chesterfield County371,042+1.6%
199Douglas County369,831+2.6%
200Hamilton County369,725+0.5%
201Davis County367,590+1.1%
202Anoka County367,557+0.8%
203Horry County366,100+3.5%
204Washtenaw County364,941-1.8%
205Larimer County362,865+0.8%
206Hamilton County357,542+2.4%
207Galveston County355,670+1.2%
208Westmoreland County353,695-0.2%
209Nueces County353,538-0%
210Rutherford County351,202+2.3%
211Marion County347,887+0.5%
212Somerset County346,069+0.5%
213St. Lucie County344,403+3.9%
214Weld County339,891+2.6%
215Rockland County339,874+0.7%
216Cumberland County339,459+0.7%
217Spartanburg County335,481+1.9%
218Howard County335,267+0.7%
219Henrico County334,546-0.1%
220Boulder County327,325-1.1%
221Greater Bridgeport Planning Region326,850+0.8%
222Durham County326,694+1.3%
223Luzerne County325,987+0.2%
224Escambia County323,787+0.4%
225Lancaster County323,504+0.1%
226Fayette County320,450-0.7%
227Rockingham County318,370+1.2%
228Northampton County318,234+1.7%
229Albany County316,195+0.6%
230Lubbock County314,608+1%
231Lorain County314,094+0.2%
232McHenry County311,702+0.6%
233Cumberland County306,150+0.8%
234Gloucester County304,700+0.7%
235Greene County301,133+0.6%
236Lexington County300,722+1.9%
237Clayton County298,828-0.2%
238Ottawa County298,369+0.5%
239Thurston County298,313+0.8%
240Cleveland County298,188+0.7%
241Dutchess County297,659+0.5%
242Leon County296,045+0.7%
243Chatham County295,961+0.3%
244Benton County294,169+2.6%
245St. Louis city293,553-2.2%
246St. Johns County293,352+5.9%
247Anchorage Municipality288,923-0.7%
248York County288,851+1.8%
249Dauphin County288,284+0.6%
250Merced County287,854+1.8%

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

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

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. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank US counties by population using official data, and cite the source.
rank_places {"indicator":"population","level":"province","within":"United States","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population&level=province&within=United%20States&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest population?

Los Angeles County, with 9.81 million in 2021, according to the U.S. Census Bureau.

Which county has the lowest population?

Loving County, with 57 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, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.

Population: other rankings

US counties: more rankings