This is a list of the 100 most populous counties in the United States based on the national decennial US census conducted on April 1, 2020 and vintage Census population estimates for July 1, 2022.^[1]

Many of the counties on the list include major cities or metropolitan areas in all parts of the United States. Six of the listed counties have consolidated city and county government, namely the City and County of Honolulu, Metropolitan Government of Nashville and Davidson County, Tennessee, City and County of Philadelphia, City and County of San Francisco, City of Jacksonville and Duval County and City and County of Denver.^[2]^[3]^[4] New York County, Bronx County, Kings County, Queens County and Richmond County are coterminous with the respective boroughs of New York City; they fall under the jurisdiction of the combined city government. Independent cities are not counted.

Many of the most populous counties listed are in Southern California, Illinois, Texas and New York and roughly correspond to the most populous cities in the United States. Counties in the Western United States are typically larger by area, so they often have higher raw populations even with comparable population densities.

List

This list lists the most populous US counties sorted according to both the 2020 official enumeration and 2022 vintage population estimates by the United States Census Bureau (USCB).

Rank	County	State	Land area		April 1, 2020 census	July 1, 2022 estimates	Mid-2020 to mid-2022 change		County seat
Rank	County	State	km²^[5]	mi²^[6]	April 1, 2020 census	July 1, 2022 estimates	absolute	%	County seat
1	Los Angeles	California	10,509.87	4,057.88	10,014,009	9,721,138	-292,871	-2.9	Los Angeles
2	Cook	Illinois	2,448.38	945.33	5,275,541	5,109,292	-166,249	-3.2	Chicago
3	Harris	Texas	4,411.99	1,703.48	4,731,145	4,780,913	49,768	1.1	Houston
4	Maricopa	Arizona	23,828.26	9,200.14	4,420,568	4,551,524	130,956	3.0	Phoenix
5	San Diego	California	10,895.12	4,206.63	3,298,634	3,276,208	-22,426	-0.7	San Diego
6	Orange	California	2,047.56	790.57	3,186,989	3,151,184	-35,805	-1.1	Santa Ana
7	Miami-Dade	Florida	4,915.06	1,897.72	2,701,767	2,673,837	-27,930	-1.0	Miami
8	Dallas	Texas	2,256.60	871.28	2,613,539	2,600,840	-12,699	-0.5	Dallas
9	Kings	New York	183.41	70.82	2,736,074	2,590,516	-145,558	-5.3	Brooklyn, NYC
10	Riverside	California	18,664.70	7,206.48	2,418,185	2,473,902	55,717	2.3	Riverside
11	Clark	Nevada	20,438.71	7,891.43	2,265,461	2,322,985	57,524	2.5	Las Vegas
12	Queens	New York	281.10	108.53	2,405,464	2,278,029	-127,435	-5.3	Queens, NYC
13	King	Washington	5,479.29	2,115.57	2,269,675	2,266,789	-2,886	-0.1	Seattle
14	San Bernardino	California	51,947.23	20,056.94	2,181,654	2,193,656	12,002	0.6	San Bernardino
15	Tarrant	Texas	2,236.74	863.61	2,110,640	2,154,595	43,955	2.1	Fort Worth
16	Bexar	Texas	3,211.12	1,239.82	2,009,324	2,059,530	50,206	2.5	San Antonio
17	Broward	Florida	3,133.33	1,209.79	1,944,375	1,947,026	2,651	0.1	Fort Lauderdale
18	Santa Clara	California	3,341.34	1,290.10	1,936,259	1,870,945	-65,314	-3.4	San Jose
19	Wayne	Michigan	1,585.28	612.08	1,793,561	1,757,043	-36,518	-2.0	Detroit
20	Alameda	California	1,914.05	739.02	1,682,353	1,628,997	-53,356	-3.2	Oakland
21	Middlesex	Massachusetts	2,118.14	817.82	1,632,002	1,617,105	-14,897	-0.9	Lowell and Cambridge
22	New York	New York	59.13	22.83	1,694,251	1,596,273	-97,978	-5.8	Manhattan, NYC
23	Sacramento	California	2,498.42	964.64	1,584,169	1,588,921	4,752	0.3	Sacramento
24	Philadelphia	Pennsylvania	347.32	134.10	1,603,797	1,567,258	-36,539	-2.3	Philadelphia
25	Suffolk	New York	2,362.20	912.05	1,525,920	1,525,465	-455	-0.0	Riverhead
26	Palm Beach	Florida	5,100.00	1,970.00	1,492,191	1,518,477	26,286	1.8	West Palm Beach
27	Hillsborough		2,642.34	1,020.21	1,459,762	1,513,301	53,539	3.7	Tampa
28	Orange		2,339.87	903.43	1,429,908	1,452,726	22,818	1.6	Orlando
29	Nassau	New York	737.41	284.72	1,395,774	1,383,726	-12,048	-0.9	Mineola
30	Bronx	New York	109.03	42.10	1,472,654	1,379,946	-92,708	-6.3	Bronx, NYC
31	Travis	Texas	2,564.61	990.20	1,290,188	1,326,436	36,248	2.8	Austin
32	Franklin	Ohio	1,378.36	532.19	1,323,807	1,321,820	-1,987	-0.2	Columbus
33	Oakland	Michigan	2,247.24	867.66	1,274,395	1,269,431	-4,964	-0.4	Pontiac
34	Hennepin	Minnesota	1,433.79	553.59	1,281,565	1,260,121	-21,444	-1.7	Minneapolis
35	Cuyahoga	Ohio	1,184.12	457.19	1,264,817	1,236,041	-28,776	-2.3	Cleveland
36	Allegheny	Pennsylvania	1,890.88	730.07	1,250,578	1,233,253	-17,325	-1.4	Pittsburgh
37	Salt Lake	Utah	1,922.50	742.28	1,185,238	1,186,257	1,019	0.1	Salt Lake City
38	Wake	North Carolina	2,163.21	835.22	1,129,410	1,175,021	45,611	4.0	Raleigh
39	Collin	Texas	2,178.76	841.22	1,064,465	1,158,696	94,231	8.9	McKinney
40	Contra Costa	California	1,854.27	715.94	1,165,927	1,156,966	-8,961	-0.8	Martinez
41	Mecklenburg	North Carolina	1,356.75	523.84	1,115,482	1,145,392	29,910	2.7	Charlotte
42	Fairfax	Virginia	1,012.60	390.97	1,150,309	1,138,331	-11,978	-1.0	Fairfax
43	Fulton	Georgia	1,363.98	526.63	1,066,710	1,074,634	7,924	0.7	Atlanta
44	Pima	Arizona	23,794.31	9,187.04	1,043,433	1,057,597	14,164	1.4	Tucson
45	Montgomery	Maryland	1,272.34	491.25	1,062,061	1,052,521	-9,540	-0.9	Rockville
46	Duval	Florida	1,974.07	762.19	995,567	1,016,536	20,969	2.1	Jacksonville
47	Fresno	California	15,431.13	5,957.99	1,008,654	1,015,190	6,536	0.6	Fresno
48	Honolulu	Hawaii	1,555.92	600.74	1,016,508	995,638	-20,870	-2.1	Honolulu
49	Westchester	New York	1,114.98	430.50	1,004,457	990,427	-14,030	-1.4	White Plains
50	St. Louis	Missouri	1,315.20	507.80	1,004,125	990,414	-13,711	-1.4	Clayton
51	Capitol	Connecticut	2,660.80	1,027.34	976,248	981,447	5,199	0.5	Hartford
52	Denton	Texas	2,275.13	878.43	906,422	977,281	70,859	7.8	Denton
53	Gwinnett	Georgia	1,114.69	430.38	957,062	975,353	18,291	1.9	Lawrenceville
54	Marion	Indiana	1,026.41	396.30	977,203	969,466	-7,737	-0.8	Indianapolis
55	Pinellas	Florida	709.14	273.80	959,107	961,739	2,632	0.3	Clearwater
56	Bergen	New Jersey	603.49	233.01	955,732	952,997	-2,735	-0.3	Hackensack
57	Erie	New York	2,700.56	1,042.69	954,236	950,312	-3,924	-0.4	Buffalo
58	Prince George's	Maryland	1,250.16	482.69	967,201	946,971	-20,230	-2.1	Upper Marlboro
59	Pierce	Washington	4,324.01	1,669.51	921,130	927,380	6,250	0.7	Tacoma
60	DuPage	Illinois	848.22	327.50	932,877	920,901	-11,976	-1.3	Wheaton
61	Milwaukee	Wisconsin	625.23	241.40	939,489	918,661	-20,828	-2.2	Milwaukee
62	Shelby	Tennessee	1,976.61	763.17	929,744	916,371	-13,373	-1.4	Memphis
63	Kern	California	21,061.57	8,131.92	909,235	916,108	6,873	0.8	Bakersfield
64	Fort Bend	Texas	2,292	885	822,779	889,146	66,367	8.1	Richmond
65	Hidalgo	Texas	4,068.52	1,570.87	870,781	888,367	17,586	2.0	Edinburg
66	Macomb	Michigan	1,241.18	479.22	881,217	874,195	-7,022	-0.8	Mount Clemens
67	El Paso	Texas	2,622.86	1,012.69	865,657	868,763	3,106	0.4	El Paso
68	Montgomery	Pennsylvania	1,251.07	483.04	856,553	864,683	8,130	0.9	Norristown
69	Worcester	Massachusetts	3,912.88	1,510.77	862,111	862,927	816	0.1	Worcester
70	Middlesex	New Jersey	800.08	308.91	863,162	861,418	-1,744	-0.2	New Brunswick
71	Essex	New Jersey	326.89	126.21	863,728	849,477	-14,251	-1.6	Newark
72	Baltimore	Maryland	1,549.59	598.30	854,535	846,161	-8,374	-1.0	Towson
73	Snohomish	Washington	5,406.01	2,087.27	827,957	840,079	12,122	1.5	Everett
74	Ventura	California	4,773.69	1,843.13	843,843	832,605	-11,238	-1.3	Ventura
75	Hamilton	Ohio	1,051.30	405.91	830,639	825,037	-5,602	-0.7	Cincinnati
76	Lee	Florida	2,031.88	784.51	760,822	822,453	61,631	8.1	Fort Myers
77	San Francisco	California	121.40	46.87	873,965	808,437	-65,528	-7.5	San Francisco
78	Essex	Massachusetts	1,275.73	492.56	809,829	806,765	-3,064	-0.4	Salem and Lawrence
79	Oklahoma	Oklahoma	1,835.83	708.82	796,292	802,559	6,267	0.8	Oklahoma City
80	Multnomah	Oregon	1,117.05	431.30	815,428	795,083	-20,345	-2.5	Portland
81	San Joaquin	California	3,603.51	1,391.32	779,233	793,229	13,996	1.8	Stockton
82	Polk	Florida	4,660	1,798	725,046	787,404	62,358	8.6	Bartow
83	Jefferson	Kentucky	985.27	380.42	782,969	773,399	-9,570	-1.2	Louisville
84	Cobb	Georgia	879.43	339.55	766,149	771,952	5,803	0.8	Marietta
85	Suffolk	Massachusetts	150.62	58.15	797,936	766,381	-31,555	-4.0	Boston
86	DeKalb	Georgia	693.03	267.58	764,382	762,820	-1,562	-0.2	Decatur
87	Monroe	New York	1,702.15	657.21	759,443	752,035	-7,408	-1.0	Rochester
88	El Paso	Colorado	5,508.39	2,126.80	730,395	740,567	10,172	1.4	Colorado Springs
89	San Mateo	California	1,161.37	448.41	764,442	729,181	-35,261	-4.6	Redwood City
90	Norfolk	Massachusetts	1,025.91	396.11	725,981	725,531	-450	-0.1	Dedham
91	Jackson	Missouri	1,565.55	604.46	717,204	716,531	-673	-0.1	Independence and Kansas City
92	Denver	Colorado	401.36	154.97	715,522	713,252	-2,270	-0.3	Denver
93	Lake	Illinois	1,149.10	443.67	714,342	709,150	-5,192	-0.7	Waukegan
94	Davidson	Tennessee	1,305.44	504.03	715,884	708,144	-7,740	-1.1	Nashville
95	Hudson	New Jersey	119.63	46.19	724,854	703,366	-21,488	-3.0	Jersey City
96	Utah	Utah	5,188.91	2,003.45	659,399	702,434	43,035	6.5	Provo
97	Will	Illinois	2,167.58	836.91	696,355	696,757	402	0.1	Joliet
98	Montgomery	Texas	2,699.23	1,042.18	620,443	678,490	58,047	9.4	Conroe
99	Tulsa	Oklahoma	1,476.86	570.22	669,279	677,358	8,079	1.2	Tulsa
100	Bernalillo	New Mexico	3,006.53	1,160.83	676,444	672,508	-3,936	-0.6	Albuquerque

Gallery

Downtown Los Angeles, county seat of Los Angeles County, California, the most populous county in the United States. County buildings and the civic center, pictured at the bottom right.
Downtown Chicago, in Cook County, Illinois, the second-most populous county in the United States.
Downtown Houston, located in Harris County, Texas, the third-most populous county in the United States.
Downtown Phoenix, Arizona, county seat of the fourth-most populous county in the United States, Maricopa.
Downtown San Diego, California. San Diego County is the fifth-most populous county in the United States.
Aerial view of Orange County, California, the sixth-most populous county in the United States.
Downtown Miami in Miami-Dade County, the largest county in Florida, and the county seat of the seventh-most populous county in the United States.
Uptown Dallas with Downtown Dallas on the end, located in Dallas County, Texas, the eighth-most populous county in the United States.
Downtown Brooklyn in Kings County, New York, the ninth-most populous county in the United States.
Downtown Riverside the seat of Riverside County, California, the tenth-most populous county in the United States.

References

^ "Growth in the Nation's Largest Counties Rebounds in 2022". United States Census Bureau. Retrieved March 30, 2023.
^ "This Is Your City and County of Honolulu Government". City and County of Honolulu. Archived from the original on January 20, 2008. Retrieved January 23, 2008.
^ "City and County Organizational Chart". City and County of San Francisco. Archived from the original on February 3, 2008. Retrieved January 23, 2008.
^ "Active Colorado Municipalities as of January 26, 2010". Colorado Department of Local Affairs. Archived from the original on December 12, 2009. Retrieved January 26, 2010.
^ GeoHive - the United States of America - US States and Counties Archived April 30, 2012, at the Wayback Machine (attached Excel spreadsheet)
^ The area in square kilometers of the column to the left divided by 2.589988110336 (1.609344²).

v t e United States county-related lists
General	Index By state or territory FIPS codes Former counties Secession proposals
Demographics	Population African-American majority Hispanic/Latino majority Native American majority Non-English speaking counties Most populous counties by state or territory Most densely populated county least Life expectancy shortest longest
Economy	Highest-income Lowest-income Per capita income
Geography	Largest area Smallest area Highest mean elevation
Name origins	Etymologies A–D E–I J–M N–R S–Z Former Most common names Named after Confederate historical figures Named after rivers Named after U.S. Presidents Named after women
See also	County statistics of the United States Smithsonian trinomial