| 1. | Gloucester County, NJ (Glassboro, Williamstown, Woodbury) (pop. 254,673) | 0.9 |
| 2. | Santa Cruz County, CA (Santa Cruz, Watsonville, San Lorenzo Valley) (pop. 255,602) | 0.9 |
| 3. | Larimer County, CO (Fort Collins, Loveland, Estes Park) (pop. 251,494) | 1.0 |
| 4. | Dutchess County, NY (Poughkeepsie, Wappinger, East Fishkill) (pop. 280,150) | 1.0 |
| 5. | Boulder County, CO (Boulder, Longmont, Lafayette) (pop. 291,288) | 1.0 |
| 6. | Sarasota County, FL (Sarasota, Interior County, Gulf Gate-Osprey) (pop. 325,957) | 1.0 |
| 7. | Waukesha County, WI (Waukesha, Brookfield, New Berlin) (pop. 360,767) | 1.0 |
| 8. | Morris County, NJ (Morristown, Dover, Madison) (pop. 470,212) | 1.2 |
| 9. | Dakota County, MN (Eagan, Burnsville, Apple Valley) (pop. 355,904) | 1.5 |
| 10. | McHenry County, IL (Crystal Lake, Algonquin, Lake in the Hills) (pop. 260,077) | 1.6 |
| 11. | Lane County, OR (Eugene, Springfield, Badger Mountain) (pop. 322,959) | 2.0 |
| 12. | Ocean County, NJ (Toms River, Lakewood, Point Pleasant) (pop. 510,916) | 2.5 |
| 13. | Monmouth County, NJ (Long Branch, Asbury Park, Tinton Falls) (pop. 615,301) | 2.6 |
| 14. | Bergen County, NJ (Hackensack, Teaneck, Fort Lee) (pop. 884,118) | 2.7 |
| 15. | Hillsborough County, NH (Manchester, Nashua, Merrimack) (pop. 380,841) | 2.8 |
| 16. | Anchorage Municipality, AK (Anchorage) (pop. 260,283) | 2.8 |
| 17. | San Mateo County, CA (Daly City, San Mateo, Redwood City) (pop. 707,161) | 2.8 |
| 18. | Madison County, IL (Granite City, Alton, Collinsville) (pop. 258,941) | 2.9 |
| 19. | Rockland County, NY (Ramapo, Clarkstown, Orangetown) (pop. 286,753) | 2.9 |
| 20. | Sonoma County, CA (Santa Rosa, Petaluma, Rohnert Park) (pop. 458,614) | 2.9 |
| 21. | Santa Clara County, CA (San Jose, Sunnyvale, Santa Clara) (pop. 1,682,585) | 2.9 |
| 22. | Anoka County, MN (Coon Rapids, Blaine, Fridley) (pop. 298,084) | 3.0 |
| 23. | Collier County, FL (Naples, Golden Gate, Immokalee) (pop. 251,377) | 3.0 |
| 24. | Middlesex County, NJ (Edison, New Brunswick, Perth Amboy) (pop. 750,162) | 3.1 |
| 25. | Norfolk County, MA (Quincy, Brookline, Weymouth) (pop. 650,308) | 3.1 |
| 26. | Middlesex County, MA (Lowell, Cambridge, Newton) (pop. 1,465,396) | 3.1 |
| 27. | San Francisco County, CA (San Francisco) (pop. 776,733) | 3.1 |
| 28. | Richmond County, NY (Staten Island) (pop. 443,728) | 3.3 |
| 29. | New York County, NY (New York, Manhattan) (pop. 1,537,195) | 3.3 |
| 30. | Galveston County, TX (Galveston, League City, Texas City) (pop. 250,158) | 3.4 |
| 31. | Passaic County, NJ (Paterson, Clifton, Passaic) (pop. 489,049) | 3.4 |
| 32. | Washtenaw County, MI (Ann Arbor, Ypsilanti, Saline) (pop. 322,895) | 3.4 |
| 33. | St. Charles County, MO (St. Charles, St. Peters, O'Fallon) (pop. 283,883) | 3.4 |
| 34. | King County, WA (Seattle, East Seattle, Bellevue) (pop. 1,737,034) | 3.5 |
| 35. | Hudson County, NJ (Jersey City, Union City, Bayonne) (pop. 608,975) | 3.5 |
| 36. | Orange County, CA (North Coast, Santa Ana, Anaheim) (pop. 2,846,289) | 3.5 |
| 37. | Utah County, UT (Provo, Orem, Pleasant Grove) (pop. 368,536) | 3.6 |
| 38. | Santa Barbara County, CA (Santa Maria Valley, Santa Barbara, Santa Maria) (pop. 399,347) | 3.6 |
| 39. | Plymouth County, MA (Brockton, Wareham, Middleborough) (pop. 472,822) | 3.6 |
| 40. | Suffolk County, NY (Brentwood, West Babylon, Commack) (pop. 1,419,369) | 3.6 |
| 41. | Luzerne County, PA (Wilkes-Barre, Back Mountain, Hazleton) (pop. 319,250) | 3.7 |
| 42. | Alameda County, CA (Oakland, Fremont, Hayward) (pop. 1,443,741) | 3.7 |
| 43. | Fort Bend County, TX (Sugar Land, Missouri City, Mission Bend) (pop. 354,452) | 3.7 |
| 44. | El Paso County, TX (El Paso, Socorro, San Elizario) (pop. 679,622) | 3.8 |
| 45. | Snohomish County, WA (Everett, Edmonds, Seattle Hill-Silver Firs) (pop. 606,024) | 3.8 |
| 46. | Ada County, ID (Boise, Meridian, Orchard) (pop. 300,904) | 3.8 |
| 47. | Washington County, OR (Beaverton, Hillsboro, Somerset West-Rock Creek) (pop. 445,342) | 3.8 |
| 48. | San Diego County, CA (San Diego, Chula Vista, Oceanside) (pop. 2,813,833) | 3.8 |
| 49. | Nassau County, NY (North Hempstead, Hempstead, Levittown) (pop. 1,334,544) | 3.8 |
| 50. | Collin County, TX (Plano, McKinney, Allen) (pop. 491,675) | 3.9 |
| 51. | Contra Costa County, CA (Central Contra Costa, West Contra Costa, Concord) (pop. 948,816) | 3.9 |
| 52. | Queens County, NY (Queens) (pop. 2,229,379) | 3.9 |
| 53. | Spartanburg County, SC (Spartanburg, Pauline, Fairmont Mills) (pop. 253,791) | 3.9 |
| 54. | Essex County, MA (Lynn, Lawrence, Haverhill) (pop. 723,419) | 3.9 |
| 55. | Westmoreland County, PA (Murrysville, Municipality of Murrysville, Greensburg) (pop. 369,993) | 4.0 |
| 56. | Fairfield County, CT (Bridgeport, Stamford, Norwalk) (pop. 882,567) | 4.0 |
| 57. | Westchester County, NY (Yonkers, Greenburgh, New Rochelle) (pop. 923,459) | 4.0 |
| 58. | Jefferson County, CO (Northeast Jefferson, Lakewood, Arvada) (pop. 527,056) | 4.0 |
| 59. | Denton County, TX (Denton, Lewisville, Flower Mound) (pop. 432,976) | 4.0 |
| 60. | Los Angeles County, CA (Los Angeles, East San Gabriel Valley, Long Beach) (pop. 9,519,338) | 4.0 |
| 61. | Montgomery County, PA (Norristown, Pottstown, King of Prussia) (pop. 750,097) | 4.0 |
| 62. | Nueces County, TX (Corpus Christi, Robstown, Port Aransas) (pop. 313,645) | 4.1 |
| 63. | Monterey County, CA (Salinas, Seaside, Monterey) (pop. 401,762) | 4.1 |
| 64. | Bristol County, MA (New Bedford, Fall River, Taunton) (pop. 534,678) | 4.1 |
| 65. | Kings County, NY (Brooklyn) (pop. 2,465,326) | 4.1 |
| 66. | Hidalgo County, TX (McAllen, Southeast Hidalgo, Edinburg) (pop. 569,463) | 4.2 |
| 67. | Fairfax County, VA (Burke, Reston, Annandale) (pop. 969,749) | 4.2 |
| 68. | Burlington County, NJ (Moorestown-Lenola, Franklin Park, Browns Mills) (pop. 423,394) | 4.3 |
| 69. | Clark County, WA (Vancouver, Hazel Dell, Orchards) (pop. 345,238) | 4.3 |
| 70. | Ventura County, CA (Oxnard, Thousand Oaks, Simi Valley) (pop. 753,197) | 4.3 |
| 71. | DuPage County, IL (Naperville, Wheaton, Downers Grove) (pop. 904,161) | 4.4 |
| 72. | Miami-Dade County, FL (Miami, Kendale Lakes-Lindgren Acres, Hialeah) (pop. 2,253,362) | 4.4 |
| 73. | Union County, NJ (Elizabeth, Union, Plainfield) (pop. 522,541) | 4.4 |
| 74. | Dane County, WI (Madison, Fitchburg, Sun Prairie) (pop. 426,526) | 4.4 |
| 75. | Riverside County, CA (Riverside, Perris Valley, Moreno Valley) (pop. 1,545,387) | 4.4 |
| 76. | Travis County, TX (Austin, Pflugerville, Wells Branch) (pop. 812,280) | 4.4 |
| 77. | Tulare County, CA (Visalia, Tulare, Porterville) (pop. 368,021) | 4.4 |
| 78. | Montgomery County, TX (Southeast Montgomery, The Woodlands, Conroe) (pop. 293,768) | 4.4 |
| 79. | Montgomery County, MD (Silver Spring, Wheaton-Glenmont, Germantown) (pop. 873,341) | 4.5 |
| 80. | Salt Lake County, UT (Salt Lake City, West Valley City, Sandy) (pop. 898,387) | 4.5 |
| 81. | Suffolk County, MA (Boston, Revere, Chelsea) (pop. 689,807) | 4.5 |
| 82. | Hennepin County, MN (Minneapolis, Bloomington, Brooklyn Park) (pop. 1,116,200) | 4.5 |
| 83. | Multnomah County, OR (Portland, Gresham, Troutdale) (pop. 660,486) | 4.6 |
| 84. | Chester County, PA (West Chester, Phoenixville, Coatesville) (pop. 433,501) | 4.6 |
| 85. | Sacramento County, CA (Sacramento, Mather, Arden-Arcade) (pop. 1,223,499) | 4.6 |
| 86. | Bucks County, PA (Levittown, Morrisville, Croydon) (pop. 597,635) | 4.6 |
| 87. | Johnson County, KS (Overland Park, Olathe, Shawnee) (pop. 451,086) | 4.6 |
| 88. | Marion County, OR (Salem, Keizer, Woodburn) (pop. 284,834) | 4.6 |
| 89. | Chesterfield County, VA (Meadowbrook, Chester, Bon Air) (pop. 259,903) | 4.7 |
| 90. | Clark County, NV (Las Vegas, Paradise, Henderson) (pop. 1,375,765) | 4.7 |
| 91. | Lake County, IL (Waukegan, North Chicago, Highland Park) (pop. 644,356) | 4.7 |
| 92. | Gwinnett County, GA (Dacula-Rocky Creek, Lawrenceville, Duluth) (pop. 588,448) | 4.7 |
| 93. | Worcester County, MA (Worcester, Leominster, Fitchburg) (pop. 750,963) | 4.7 |
| 94. | Douglas County, NE (Omaha, Ralston, Elkhorn) (pop. 463,585) | 4.7 |
| 95. | York County, PA (York, Hanover, Shiloh) (pop. 381,751) | 4.8 |
| 96. | Lancaster County, NE (Lincoln, Waverly, Hickman) (pop. 250,291) | 4.8 |
| 97. | Northampton County, PA (Bethlehem, Easton, Northampton) (pop. 267,066) | 4.8 |
| 98. | Spokane County, WA (Spokane, Spokane Valley, Opportunity) (pop. 417,939) | 4.8 |
| 99. | Palm Beach County, FL (Sunshine Parkway, West Palm Beach, Boca Raton) (pop. 1,131,184) | 4.9 |
| 100. | Pierce County, WA (Tacoma, Lakewood, Graham-Thrift) (pop. 700,820) | 4.9 |
| 101. | Knox County, TN (Knoxville, Concord, Farragut) (pop. 382,032) | 4.9 |