Ranking of US Counties By Population in 2020
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2020, the Population for the United States was 331.58M. Among all US counties, Los Angeles County had the highest population (10.00M), followed by Cook County (5.27M), and Harris County (4.74M).
On the other hand, Loving County had the lowest population (67) followed by Kalawao County (80), and King County (267).
The chart below shows the top 10 counties with high population, and the table below shows the ranking of the top 200 US counties.
You can see similar ranking information for related topics. You can also see links at the bottom of the page for the ranking of counties for each state.
You may also be interested in:
Related Topics: US Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
Ranking of US Counties By Population in 2020
Items per page:
25
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| Rank | County | Population |
|---|---|---|
| 1 | Los Angeles County, CA | 9996634 |
| 2 | Cook County, IL | 5267072 |
| 3 | Harris County, TX | 4735383 |
| 4 | Maricopa County, AZ | 4445415 |
| 5 | San Diego County, CA | 3301182 |
| 6 | Orange County, CA | 3186261 |
| 7 | Kings County, NY | 2716455 |
| 8 | Miami-Dade County, FL | 2695729 |
| 9 | Dallas County, TX | 2610741 |
| 10 | Riverside County, CA | 2424663 |
| 11 | Queens County, NY | 2389813 |
| 12 | Clark County, NV | 2275970 |
| 13 | King County, WA | 2274349 |
| 14 | San Bernardino County, CA | 2183526 |
| 15 | Tarrant County, TX | 2116297 |
| 16 | Bexar County, TX | 2015620 |
| 17 | Broward County, FL | 1943497 |
| 18 | Santa Clara County, CA | 1924802 |
| 19 | Wayne County, MI | 1789655 |
| 20 | Alameda County, CA | 1680614 |
| 21 | New York County, NY | 1679602 |
| 22 | Middlesex County, MA | 1627578 |
| 23 | Philadelphia County, PA | 1600788 |
| 24 | Sacramento County, CA | 1586727 |
| 25 | Suffolk County, NY | 1522175 |
| 26 | Palm Beach County, FL | 1494276 |
| 27 | Hillsborough County, FL | 1466320 |
| 28 | Bronx County, NY | 1459323 |
| 29 | Orange County, FL | 1431720 |
| 30 | Nassau County, NY | 1390584 |
| 31 | Franklin County, OH | 1324505 |
| 32 | Travis County, TX | 1296610 |
| 33 | Hennepin County, MN | 1281722 |
| 34 | Oakland County, MI | 1272526 |
| 35 | Cuyahoga County, OH | 1262635 |
| 36 | Allegheny County, PA | 1249671 |
| 37 | Salt Lake County, UT | 1187028 |
| 38 | Contra Costa County, CA | 1166165 |
| 39 | Fairfax County, VA | 1148680 |
| 40 | Wake County, NC | 1130694 |
| 41 | Mecklenburg County, NC | 1116263 |
| 42 | Collin County, TX | 1075651 |
| 43 | Fulton County, GA | 1069333 |
| 44 | Montgomery County, MD | 1060856 |
| 45 | Pima County, AZ | 1045227 |
| 46 | Honolulu County, HI | 1012407 |
| 47 | Fresno County, CA | 1009613 |
| 48 | St. Louis County, MO | 1003376 |
| 49 | Westchester County, NY | 1001489 |
| 50 | Duval County, FL | 997826 |
| 51 | Marion County, IN | 976706 |
| 52 | Prince George's County, MD | 965398 |
| 53 | Capitol Planning Region, CT | 964088 |
| 54 | Pinellas County, FL | 959839 |
| 55 | Gwinnett County, GA | 958378 |
| 56 | Bergen County, NJ | 953711 |
| 57 | Erie County, NY | 952353 |
| 58 | Milwaukee County, WI | 938609 |
| 59 | DuPage County, IL | 931508 |
| 60 | Shelby County, TN | 929788 |
| 61 | Pierce County, WA | 923655 |
| 62 | Denton County, TX | 914510 |
| 63 | Kern County, CA | 906124 |
| 64 | Macomb County, MI | 880294 |
| 65 | San Francisco County, CA | 874826 |
| 66 | Hidalgo County, TX | 872892 |
| 67 | El Paso County, TX | 866684 |
| 68 | Middlesex County, NJ | 861460 |
| 69 | Essex County, NJ | 860020 |
| 70 | Worcester County, MA | 857092 |
| 71 | Montgomery County, PA | 856900 |
| 72 | Baltimore County, MD | 853338 |
| 73 | Ventura County, CA | 843808 |
| 74 | Hamilton County, OH | 830418 |
| 75 | Snohomish County, WA | 829975 |
| 76 | Fort Bend County, TX | 829335 |
| 77 | Multnomah County, OR | 816321 |
| 78 | Essex County, MA | 807781 |
| 79 | Oklahoma County, OK | 798283 |
| 80 | Suffolk County, MA | 797239 |
| 81 | Jefferson County, KY | 782896 |
| 82 | San Joaquin County, CA | 780676 |
| 83 | Cobb County, GA | 766383 |
| 84 | Lee County, FL | 765566 |
| 85 | DeKalb County, GA | 764630 |
| 86 | San Mateo County, CA | 762727 |
| 87 | Monroe County, NY | 757747 |
| 88 | El Paso County, CO | 733804 |
| 89 | Polk County, FL | 730179 |
| 90 | Norfolk County, MA | 723750 |
| 91 | Hudson County, NJ | 721909 |
| 92 | Jackson County, MO | 717662 |
| 93 | Denver County, CO | 717620 |
| 94 | Davidson County, TN | 716095 |
| 95 | Lake County, IL | 713426 |
| 96 | Will County, IL | 696909 |
| 97 | Bernalillo County, NM | 676882 |
| 98 | Jefferson County, AL | 674727 |
| 99 | Tulsa County, OK | 670708 |
| 100 | Utah County, UT | 663606 |
| 101 | Providence County, RI | 660044 |
| 102 | Kent County, MI | 658524 |
| 103 | Arapahoe County, CO | 655312 |
| 104 | Bucks County, PA | 646190 |
| 105 | Monmouth County, NJ | 642778 |
| 106 | Ocean County, NJ | 638554 |
| 107 | Montgomery County, TX | 625420 |
| 108 | Western Connecticut Planning Region, CT | 618762 |
| 109 | Williamson County, TX | 615631 |
| 110 | Johnson County, KS | 611161 |
| 111 | Brevard County, FL | 608792 |
| 112 | Washington County, OR | 601045 |
| 113 | Anne Arundel County, MD | 593412 |
| 114 | Douglas County, NE | 585451 |
| 115 | Baltimore city, MD | 583189 |
| 116 | Jefferson County, CO | 583169 |
| 117 | Bristol County, MA | 576776 |
| 118 | Delaware County, PA | 576523 |
| 119 | Union County, NJ | 573680 |
| 120 | New Castle County, DE | 570957 |
| 121 | Pasco County, FL | 566182 |
| 122 | South Central Connecticut Planning Region, CT | 564526 |
| 123 | Dane County, WI | 562620 |
| 124 | Volusia County, FL | 555752 |
| 125 | Stanislaus County, CA | 553710 |
| 126 | Lancaster County, PA | 552834 |
| 127 | Ramsey County, MN | 551739 |
| 128 | Spokane County, WA | 541198 |
| 129 | Summit County, OH | 539835 |
| 130 | Guilford County, NC | 538761 |
| 131 | Montgomery County, OH | 537139 |
| 132 | Chester County, PA | 534860 |
| 133 | Plymouth County, MA | 528454 |
| 134 | Greenville County, SC | 527266 |
| 135 | Sedgwick County, KS | 524837 |
| 136 | Passaic County, NJ | 523464 |
| 137 | Camden County, NJ | 523151 |
| 138 | Adams County, CO | 520517 |
| 139 | Kane County, IL | 516403 |
| 140 | Morris County, NJ | 508472 |
| 141 | Clark County, WA | 505363 |
| 142 | Lake County, IN | 498963 |
| 143 | Ada County, ID | 498301 |
| 144 | Richmond County, NY | 495113 |
| 145 | Polk County, IA | 493039 |
| 146 | Sonoma County, CA | 488501 |
| 147 | Washoe County, NV | 487725 |
| 148 | Prince William County, VA | 482863 |
| 149 | Knox County, TN | 480530 |
| 150 | Onondaga County, NY | 474218 |
| 151 | Tulare County, CA | 473944 |
| 152 | Seminole County, FL | 471472 |
| 153 | Hampden County, MA | 463714 |
| 154 | Burlington County, NJ | 461694 |
| 155 | Virginia Beach city, VA | 459673 |
| 156 | York County, PA | 456754 |
| 157 | East Baton Rouge Parish, LA | 455916 |
| 158 | Solano County, CA | 452887 |
| 159 | Naugatuck Valley Planning Region, CT | 449055 |
| 160 | Santa Barbara County, CA | 448083 |
| 161 | Monterey County, CA | 440506 |
| 162 | Dakota County, MN | 440436 |
| 163 | Jefferson Parish, LA | 439747 |
| 164 | Sarasota County, FL | 436256 |
| 165 | Lucas County, OH | 430870 |
| 166 | Pinal County, AZ | 430213 |
| 167 | Berks County, PA | 428693 |
| 168 | Hillsborough County, NH | 422929 |
| 169 | Loudoun County, VA | 422723 |
| 170 | Clackamas County, OR | 422512 |
| 171 | Cameron County, TX | 421592 |
| 172 | Richland County, SC | 415697 |
| 173 | Mobile County, AL | 414409 |
| 174 | Charleston County, SC | 409958 |
| 175 | Waukesha County, WI | 407518 |
| 176 | St. Charles County, MO | 406423 |
| 177 | Placer County, CA | 405951 |
| 178 | Genesee County, MI | 405793 |
| 179 | Manatee County, FL | 401644 |
| 180 | Orange County, NY | 400997 |
| 181 | Pulaski County, AR | 399286 |
| 182 | Osceola County, FL | 391163 |
| 183 | Butler County, OH | 390887 |
| 184 | Madison County, AL | 390527 |
| 185 | Mercer County, NJ | 386492 |
| 186 | Lake County, FL | 386238 |
| 187 | Allen County, IN | 386123 |
| 188 | Lane County, OR | 384221 |
| 189 | Orleans Parish, LA | 383374 |
| 190 | Forsyth County, NC | 382634 |
| 191 | Marion County, FL | 377464 |
| 192 | Collier County, FL | 377331 |
| 193 | Stark County, OH | 374552 |
| 194 | Lehigh County, PA | 374493 |
| 195 | Brazoria County, TX | 373509 |
| 196 | Bell County, TX | 372404 |
| 197 | Washtenaw County, MI | 371849 |
| 198 | Hamilton County, TN | 367891 |
| 199 | Chesterfield County, VA | 365350 |
| 200 | Anoka County, MN | 364502 |
Ranking of Counties By Population in 2020 for each US State
Use the following links to see the ranking of counties by population for each of the following US states.