Ranking of US Counties By Total Voting-age Population (18yrs and over) from Census 2020
Updated on August 22, 2023.
According to the data from the US 2020 Census, as at April 2020, Los Angeles County, CA had the highest voting-age population (18 years and over) (7.96M), followed by Cook County, IL (4.17M), and Harris County, TX (3.52M).
The chart below shows the top 10 counties with high voting-age population, and the table below shows the ranking of the top 200 counties in the United States based on voting-age population.
You can see links at the bottom of the page for the ranking of counties by voting-age population for each state.
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Related Topics: US Census 2020 Topic List.
Data Source: US Census Bureau, 2020 Census.
Ranking of US Counties By Total Voting-age Population from Census 2020
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| Rank | County | Voting-age Population |
|---|---|---|
| 1 | Los Angeles County, CA | 7959791 |
| 2 | Cook County, IL | 4172402 |
| 3 | Harris County, TX | 3519584 |
| 4 | Maricopa County, AZ | 3382386 |
| 5 | San Diego County, CA | 2608768 |
| 6 | Orange County, CA | 2519658 |
| 7 | Miami-Dade County, FL | 2178620 |
| 8 | Kings County, NY | 2140371 |
| 9 | Dallas County, TX | 1972578 |
| 10 | Queens County, NY | 1949469 |
| 11 | Riverside County, CA | 1823505 |
| 12 | King County, WA | 1813470 |
| 13 | Clark County, NV | 1751240 |
| 14 | San Bernardino County, CA | 1629042 |
| 15 | Tarrant County, TX | 1574046 |
| 16 | Broward County, FL | 1546038 |
| 17 | Santa Clara County, CA | 1529717 |
| 18 | Bexar County, TX | 1512388 |
| 19 | New York County, NY | 1461740 |
| 20 | Wayne County, MI | 1376516 |
| 21 | Alameda County, CA | 1338388 |
| 22 | Middlesex County, MA | 1313737 |
| 23 | Philadelphia County, PA | 1278362 |
| 24 | Sacramento County, CA | 1217309 |
| 25 | Suffolk County, NY | 1214412 |
| 26 | Palm Beach County, FL | 1208624 |
| 27 | Hillsborough County, FL | 1139031 |
| 28 | Bronx County, NY | 1123075 |
| 29 | Orange County, FL | 1115798 |
| 30 | Nassau County, NY | 1098884 |
| 31 | Franklin County, OH | 1022233 |
| 32 | Allegheny County, PA | 1020183 |
| 33 | Travis County, TX | 1016490 |
| 34 | Oakland County, MI | 1013401 |
| 35 | Cuyahoga County, OH | 1008892 |
| 36 | Hennepin County, MN | 1008791 |
| 37 | Contra Costa County, CA | 902672 |
| 38 | Fairfax County, VA | 882106 |
| 39 | Salt Lake County, UT | 874895 |
| 40 | Wake County, NC | 860079 |
| 41 | Mecklenburg County, NC | 860025 |
| 42 | Fulton County, GA | 847182 |
| 43 | Pima County, AZ | 834265 |
| 44 | Montgomery County, MD | 819119 |
| 45 | Pinellas County, FL | 810121 |
| 46 | Honolulu County, HI | 809839 |
| 47 | Collin County, TX | 786838 |
| 48 | St. Louis County, MO | 784377 |
| 49 | Westchester County, NY | 782442 |
| 50 | Duval County, FL | 781603 |
| 51 | Erie County, NY | 762120 |
| 52 | San Francisco County, CA | 760738 |
| 53 | Prince George's County, MD | 756049 |
| 54 | Bergen County, NJ | 755234 |
| 55 | Fairfield County, CT | 743170 |
| 56 | Marion County, IN | 742442 |
| 57 | Fresno County, CA | 730245 |
| 58 | DuPage County, IL | 724333 |
| 59 | Milwaukee County, WI | 720446 |
| 60 | Hartford County, CT | 713425 |
| 61 | Gwinnett County, GA | 709484 |
| 62 | Pierce County, WA | 709366 |
| 63 | Shelby County, TN | 706063 |
| 64 | Macomb County, MI | 701202 |
| 65 | New Haven County, CT | 690994 |
| 66 | Worcester County, MA | 683585 |
| 67 | Middlesex County, NJ | 680009 |
| 68 | Denton County, TX | 678416 |
| 69 | Montgomery County, PA | 674024 |
| 70 | Suffolk County, MA | 670286 |
| 71 | Baltimore County, MD | 669511 |
| 72 | Multnomah County, OR | 666710 |
| 73 | Essex County, NJ | 661508 |
| 74 | Ventura County, CA | 656198 |
| 75 | Kern County, CA | 651739 |
| 76 | Hamilton County, OH | 645526 |
| 77 | El Paso County, TX | 644962 |
| 78 | Essex County, MA | 640842 |
| 79 | Snohomish County, WA | 639797 |
| 80 | Lee County, FL | 628325 |
| 81 | Jefferson County, KY | 614376 |
| 82 | San Mateo County, CA | 610236 |
| 83 | Hidalgo County, TX | 608225 |
| 84 | Monroe County, NY | 605130 |
| 85 | Oklahoma County, OK | 601822 |
| 86 | Fort Bend County, TX | 596993 |
| 87 | DeKalb County, GA | 595276 |
| 88 | Cobb County, GA | 591848 |
| 89 | Hudson County, NJ | 582751 |
| 90 | Denver County, CO | 581062 |
| 91 | Norfolk County, MA | 577336 |
| 92 | San Joaquin County, CA | 573400 |
| 93 | Davidson County, TN | 572818 |
| 94 | Polk County, FL | 566436 |
| 95 | El Paso County, CO | 558711 |
| 96 | Jackson County, MO | 554167 |
| 97 | Lake County, IL | 544037 |
| 98 | Bernalillo County, NM | 533771 |
| 99 | Providence County, RI | 527180 |
| 100 | Jefferson County, AL | 527087 |
| 101 | Will County, IL | 526087 |
| 102 | Bucks County, PA | 515340 |
| 103 | Monmouth County, NJ | 511670 |
| 104 | Tulsa County, OK | 505837 |
| 105 | Kent County, MI | 502355 |
| 106 | Arapahoe County, CO | 501680 |
| 107 | Brevard County, FL | 497095 |
| 108 | Ocean County, NJ | 482600 |
| 109 | Baltimore city, MD | 471700 |
| 110 | Jefferson County, CO | 469066 |
| 111 | Washington County, OR | 464964 |
| 112 | Johnson County, KS | 461998 |
| 113 | Bristol County, MA | 461876 |
| 114 | Montgomery County, TX | 458324 |
| 115 | Volusia County, FL | 458123 |
| 116 | Anne Arundel County, MD | 456018 |
| 117 | Williamson County, TX | 453045 |
| 118 | New Castle County, DE | 449876 |
| 119 | Delaware County, PA | 449790 |
| 120 | Dane County, WI | 448406 |
| 121 | Pasco County, FL | 448026 |
| 122 | Utah County, UT | 443266 |
| 123 | Union County, NJ | 440856 |
| 124 | Douglas County, NE | 435999 |
| 125 | Summit County, OH | 428512 |
| 126 | Ramsey County, MN | 427139 |
| 127 | Lancaster County, PA | 425314 |
| 128 | Guilford County, NC | 423763 |
| 129 | Spokane County, WA | 421551 |
| 130 | Montgomery County, OH | 420586 |
| 131 | Plymouth County, MA | 419524 |
| 132 | Chester County, PA | 412886 |
| 133 | Stanislaus County, CA | 407908 |
| 134 | Camden County, NJ | 406504 |
| 135 | Greenville County, SC | 406243 |
| 136 | Passaic County, NJ | 403816 |
| 137 | Morris County, NJ | 403593 |
| 138 | Sonoma County, CA | 393152 |
| 139 | Sedgwick County, KS | 392877 |
| 140 | Richmond County, NY | 389393 |
| 141 | Kane County, IL | 388814 |
| 142 | Adams County, CO | 386271 |
| 143 | Clark County, WA | 385835 |
| 144 | Washoe County, NV | 383847 |
| 145 | Lake County, IN | 380651 |
| 146 | Knox County, TN | 378602 |
| 147 | Ada County, ID | 378479 |
| 148 | Onondaga County, NY | 377786 |
| 149 | Sarasota County, FL | 374464 |
| 150 | Polk County, IA | 371655 |
| 151 | Seminole County, FL | 370782 |
| 152 | Hampden County, MA | 367439 |
| 153 | Burlington County, NJ | 365405 |
| 154 | Virginia Beach city, VA | 358086 |
| 155 | York County, PA | 356368 |
| 156 | East Baton Rouge Parish, LA | 355612 |
| 157 | Solano County, CA | 354770 |
| 158 | Prince William County, VA | 353402 |
| 159 | Santa Barbara County, CA | 350805 |
| 160 | Jefferson Parish, LA | 344654 |
| 161 | Hillsborough County, NH | 338264 |
| 162 | Lucas County, OH | 334866 |
| 163 | Berks County, PA | 333658 |
| 164 | Dakota County, MN | 332708 |
| 165 | Tulare County, CA | 331093 |
| 166 | Clackamas County, OR | 330868 |
| 167 | Charleston County, SC | 327897 |
| 168 | Monterey County, CA | 327777 |
| 169 | Richland County, SC | 327481 |
| 170 | Manatee County, FL | 326633 |
| 171 | Pinal County, AZ | 325640 |
| 172 | Mobile County, AL | 319427 |
| 173 | Waukesha County, WI | 318193 |
| 174 | Genesee County, MI | 315909 |
| 175 | Lane County, OR | 313477 |
| 176 | Collier County, FL | 313169 |
| 177 | Placer County, CA | 313117 |
| 178 | Lake County, FL | 312444 |
| 179 | St. Charles County, MO | 310617 |
| 180 | Pulaski County, AR | 309578 |
| 181 | Marion County, FL | 308357 |
| 182 | Orleans Parish, LA | 306196 |
| 183 | Mercer County, NJ | 304672 |
| 184 | Madison County, AL | 304143 |
| 185 | Washtenaw County, MI | 303933 |
| 186 | Loudoun County, VA | 302792 |
| 187 | Cameron County, TX | 301208 |
| 188 | Orange County, NY | 299303 |
| 189 | Butler County, OH | 299082 |
| 190 | Osceola County, FL | 297816 |
| 191 | Forsyth County, NC | 297388 |
| 192 | Stark County, OH | 294899 |
| 193 | Lehigh County, PA | 291935 |
| 194 | Horry County, SC | 290082 |
| 195 | Westmoreland County, PA | 289614 |
| 196 | Hamilton County, TN | 289447 |
| 197 | Larimer County, CO | 289333 |
| 198 | Allen County, IN | 287203 |
| 199 | Chesterfield County, VA | 276953 |
| 200 | Brazoria County, TX | 275900 |
Ranking of Counties By Total Voting-age Population for each US State from Census 2020
Use the following links to see the ranking of counties by total voting-age population for each of the following US states from the Census 2020.