| 1. | Los Angeles County, CA (Los Angeles, East San Gabriel Valley, Long Beach) (pop. 9,519,338) | 3,249 |
| 2. | Harris County, TX (Houston, Northwest Harris, Pasadena) (pop. 3,400,578) | 2,102 |
| 3. | Dallas County, TX (Dallas, Garland, Irving) (pop. 2,218,899) | 1,672 |
| 4. | Cook County, IL (Chicago, Cicero, Arlington Heights) (pop. 5,376,741) | 1,484 |
| 5. | Tarrant County, TX (Fort Worth, Northeast Tarrant, Arlington) (pop. 1,446,219) | 1,272 |
| 6. | Maricopa County, AZ (Phoenix, Mesa, Glendale) (pop. 3,072,149) | 1,206 |
| 7. | San Diego County, CA (San Diego, Chula Vista, Oceanside) (pop. 2,813,833) | 974 |
| 8. | Miami-Dade County, FL (Miami, Kendale Lakes-Lindgren Acres, Hialeah) (pop. 2,253,362) | 922 |
| 9. | Orange County, CA (North Coast, Santa Ana, Anaheim) (pop. 2,846,289) | 894 |
| 10. | San Bernardino County, CA (San Bernardino, Ontario, Fontana) (pop. 1,709,434) | 832 |
| 11. | Bexar County, TX (San Antonio, West Bexar, Southeast Bexar) (pop. 1,392,931) | 765 |
| 12. | Riverside County, CA (Riverside, Perris Valley, Moreno Valley) (pop. 1,545,387) | 741 |
| 13. | King County, WA (Seattle, East Seattle, Bellevue) (pop. 1,737,034) | 711 |
| 14. | Jefferson County, AL (Birmingham, Hoover, Bessemer) (pop. 662,047) | 710 |
| 15. | Broward County, FL (Fort Lauderdale, Hollywood, Pembroke Pines) (pop. 1,623,018) | 701 |
| 16. | Hillsborough County, FL (Tampa, Citrus Park-Fern Lake, Brandon) (pop. 998,948) | 695 |
| 17. | Oklahoma County, OK (Oklahoma City, Edmond, Midwest City) (pop. 660,448) | 609 |
| 18. | Duval County, FL (Jacksonville, Jacksonville Beach, Atlantic Beach) (pop. 778,879) | 587 |
| 19. | Queens County, NY (Queens) (pop. 2,229,379) | 580 |
| 20. | Orange County, FL (Orlando, Southwest Orange, Alafaya) (pop. 896,344) | 575 |
| 21. | Lancaster County, PA (Lancaster, Ephrata, Elizabethtown) (pop. 470,658) | 568 |
| 22. | Tulsa County, OK (Tulsa, Broken Arrow, Owasso) (pop. 563,299) | 545 |
| 23. | Alameda County, CA (Oakland, Fremont, Hayward) (pop. 1,443,741) | 538 |
| 24. | Wayne County, MI (Detroit, Livonia, Dearborn) (pop. 2,061,162) | 527 |
| 25. | Hidalgo County, TX (McAllen, Southeast Hidalgo, Edinburg) (pop. 569,463) | 525 |
| 26. | Philadelphia County, PA (Philadelphia) (pop. 1,517,550) | 523 |
| 27. | Shelby County, TN (Memphis, Bartlett, Germantown) (pop. 897,472) | 504 |
| 28. | Polk County, FL (Lakeland, Winter Haven, Bartow) (pop. 483,924) | 504 |
| 29. | Kings County, NY (Brooklyn) (pop. 2,465,326) | 499 |
| 30. | Sacramento County, CA (Sacramento, Mather, Arden-Arcade) (pop. 1,223,499) | 493 |
| 31. | Mecklenburg County, NC (Charlotte, Huntersville, Matthews) (pop. 695,454) | 491 |
| 32. | Marion County, IN (Indianapolis, Lawrence, Beech Grove) (pop. 860,454) | 488 |
| 33. | Davidson County, TN (Metropolitan Government, Nashville-Davidson, Goodlettsville) (pop. 569,891) | 485 |
| 34. | Santa Clara County, CA (San Jose, Sunnyvale, Santa Clara) (pop. 1,682,585) | 481 |
| 35. | Palm Beach County, FL (Sunshine Parkway, West Palm Beach, Boca Raton) (pop. 1,131,184) | 477 |
| 36. | Greenville County, SC (Greenville, Wade Hampton, Taylors) (pop. 379,616) | 473 |
| 37. | Fresno County, CA (Fresno, Clovis, Reedley) (pop. 799,407) | 463 |
| 38. | Franklin County, OH (Columbus, Westerville, Upper Arlington) (pop. 1,068,978) | 462 |
| 39. | Wake County, NC (Raleigh, Cary, Apex) (pop. 627,846) | 445 |
| 40. | Kern County, CA (Bakersfield, East Kern, Delano) (pop. 661,645) | 436 |
| 41. | Prince George's County, MD (Bowie, Oxon Hill-Glassmanor, Chillum) (pop. 801,515) | 430 |
| 42. | Guilford County, NC (Greensboro, High Point, Summerfield) (pop. 421,048) | 411 |
| 43. | Travis County, TX (Austin, Pflugerville, Wells Branch) (pop. 812,280) | 406 |
| 44. | Jackson County, MO (Kansas City, Independence, Lee's Summit) (pop. 654,880) | 404 |
| 45. | Hennepin County, MN (Minneapolis, Bloomington, Brooklyn Park) (pop. 1,116,200) | 393 |
| 46. | Gwinnett County, GA (Dacula-Rocky Creek, Lawrenceville, Duluth) (pop. 588,448) | 392 |
| 47. | Jefferson County, KY (Louisville, Jeffersontown, Pleasure Ridge Park) (pop. 693,604) | 384 |
| 48. | St. Louis County, MO (Florissant, Chesterfield, University City) (pop. 1,016,315) | 384 |
| 49. | Honolulu County, HI (Honolulu, Urban Honolulu, Ewa) (pop. 876,156) | 382 |
| 50. | Pierce County, WA (Tacoma, Lakewood, Graham-Thrift) (pop. 700,820) | 365 |
| 51. | Knox County, TN (Knoxville, Concord, Farragut) (pop. 382,032) | 365 |
| 52. | Pima County, AZ (Tucson, Casas Adobes, Catalina Foothills) (pop. 843,746) | 362 |
| 53. | Hamilton County, TN (Chattanooga, East Ridge, East Brainerd) (pop. 307,896) | 357 |
| 54. | Fulton County, GA (Atlanta, Sandy Springs, Roswell) (pop. 816,006) | 357 |
| 55. | Mobile County, AL (Mobile, Tanner-Williams, Prichard) (pop. 399,843) | 354 |
| 56. | Kent County, MI (Grand Rapids, Wyoming, Kentwood) (pop. 574,335) | 354 |
| 57. | Contra Costa County, CA (Central Contra Costa, West Contra Costa, Concord) (pop. 948,816) | 352 |
| 58. | Pulaski County, AR (Little Rock, North Little Rock, Jacksonville) (pop. 361,474) | 351 |
| 59. | Allegheny County, PA (Pittsburgh, Penn Hills, Bethel Park) (pop. 1,281,666) | 349 |
| 60. | Clark County, NV (Las Vegas, Paradise, Henderson) (pop. 1,375,765) | 349 |
| 61. | Milwaukee County, WI (Milwaukee, West Allis, Wauwatosa) (pop. 940,164) | 346 |
| 62. | Collin County, TX (Plano, McKinney, Allen) (pop. 491,675) | 334 |
| 63. | El Paso County, TX (El Paso, Socorro, San Elizario) (pop. 679,622) | 329 |
| 64. | Snohomish County, WA (Everett, Edmonds, Seattle Hill-Silver Firs) (pop. 606,024) | 327 |
| 65. | Cuyahoga County, OH (Cleveland, Parma, Lakewood) (pop. 1,393,978) | 326 |
| 66. | Pinellas County, FL (St. Petersburg, Clearwater, Boca Ciega) (pop. 921,482) | 324 |
| 67. | Spartanburg County, SC (Spartanburg, Pauline, Fairmont Mills) (pop. 253,791) | 323 |
| 68. | Denton County, TX (Denton, Lewisville, Flower Mound) (pop. 432,976) | 321 |
| 69. | Oakland County, MI (Farmington Hills, Troy, Southfield) (pop. 1,194,156) | 319 |
| 70. | Montgomery County, MD (Silver Spring, Wheaton-Glenmont, Germantown) (pop. 873,341) | 319 |
| 71. | Sedgwick County, KS (Wichita, Derby, Haysville) (pop. 452,869) | 317 |
| 72. | Fairfax County, VA (Burke, Reston, Annandale) (pop. 969,749) | 316 |
| 73. | Multnomah County, OR (Portland, Gresham, Troutdale) (pop. 660,486) | 313 |
| 74. | Montgomery County, OH (Dayton, Kettering, Huber Heights) (pop. 559,062) | 306 |
| 75. | Middlesex County, MA (Lowell, Cambridge, Newton) (pop. 1,465,396) | 304 |
| 76. | San Joaquin County, CA (Stockton, Lodi, Tracy) (pop. 563,598) | 304 |
| 77. | Cobb County, GA (Northeast Cobb, Marietta, Smyrna) (pop. 607,751) | 303 |
| 78. | Tulare County, CA (Visalia, Tulare, Porterville) (pop. 368,021) | 300 |
| 79. | Gaston County, NC (Gastonia, Mount Holly, Belmont) (pop. 190,365) | 293 |
| 80. | Cumberland County, NC (Fayetteville, Fort Bragg, Hope Mills) (pop. 302,963) | 291 |
| 81. | Lee County, FL (Cape Coral, Fort Myers, North Fort Myers) (pop. 440,888) | 288 |
| 82. | Bronx County, NY (Bronx) (pop. 1,332,650) | 287 |
| 83. | Madison County, AL (Huntsville, Madison, Madison Crossroads) (pop. 276,700) | 284 |
| 84. | Baltimore city, MD (Baltimore) (pop. 651,154) | 277 |
| 85. | DeKalb County, GA (North Atlanta, Redan, Dunwoody) (pop. 665,865) | 276 |
| 86. | Horry County, SC (Myrtle Beach, Socastee, Conway) (pop. 196,629) | 270 |
| 87. | Hamilton County, OH (Cincinnati, Norwood, Forest Park) (pop. 845,303) | 269 |
| 88. | McLennan County, TX (Waco, Hewitt, Bellmead) (pop. 213,517) | 269 |
| 89. | Montgomery County, PA (Norristown, Pottstown, King of Prussia) (pop. 750,097) | 269 |
| 90. | Stanislaus County, CA (Modesto, Turlock, Ceres) (pop. 446,997) | 268 |
| 91. | Ventura County, CA (Oxnard, Thousand Oaks, Simi Valley) (pop. 753,197) | 268 |
| 92. | Lake County, IN (Gary, Hammond, East Chicago) (pop. 484,564) | 266 |
| 93. | El Paso County, CO (Colorado Springs, Black Forest-Peyton, Security-Widefield) (pop. 516,929) | 265 |
| 94. | Brevard County, FL (Palm Bay, Melbourne, Titusville) (pop. 476,230) | 265 |
| 95. | Suffolk County, NY (Brentwood, West Babylon, Commack) (pop. 1,419,369) | 264 |
| 96. | Richland County, SC (Columbia, Dutch Fork, Pontiac) (pop. 320,677) | 263 |
| 97. | Montgomery County, TX (Southeast Montgomery, The Woodlands, Conroe) (pop. 293,768) | 259 |
| 98. | East Baton Rouge Parish, LA (Baton Rouge, Central, Shenandoah) (pop. 412,852) | 258 |
| 99. | Greene County, MO (Springfield, Republic, Willard) (pop. 240,391) | 258 |
| 100. | Volusia County, FL (Deltona, Daytona Beach, Port Orange) (pop. 443,343) | 255 |
| 101. | Summit County, OH (Akron, Cuyahoga Falls, Stow) (pop. 542,899) | 254 |