| 1. | Lemhi County, ID (Salmon, Patterson, Leadore) (pop. 7,806) | 21.9 |
| 2. | Los Angeles County, CA (Los Angeles, East San Gabriel Valley, Long Beach) (pop. 9,519,338) | 16.9 |
| 3. | Ravalli County, MT (Hamilton, Stevensville, Sula-Edwards) (pop. 36,070) | 16.9 |
| 4. | Kings County, CA (Hanford, Lemoore, Avenal) (pop. 129,461) | 14.9 |
| 5. | Fresno County, CA (Fresno, Clovis, Reedley) (pop. 799,407) | 14.9 |
| 6. | Tulare County, CA (Visalia, Tulare, Porterville) (pop. 368,021) | 14.8 |
| 7. | Dona Ana County, NM (Las Cruces, Dona Ana-Hill, South Dona Ana) (pop. 174,682) | 14.7 |
| 8. | Orange County, CA (North Coast, Santa Ana, Anaheim) (pop. 2,846,289) | 14.6 |
| 9. | Shoshone County, ID (Kellogg, Pinehurst, Osburn) (pop. 13,771) | 14.2 |
| 10. | Lebanon County, PA (Lebanon, Palmyra, Annville) (pop. 120,327) | 14.2 |
| 11. | Allen County, IN (Fort Wayne, New Haven, Leo-Cedarville) (pop. 331,849) | 14.1 |
| 12. | Napa County, CA (Napa, American Canyon, St. Helena) (pop. 124,279) | 13.8 |
| 13. | Fairbanks North Star Borough, AK (Fairbanks, Badger, College) (pop. 82,840) | 13.7 |
| 14. | Marion County, IN (Indianapolis, Lawrence, Beech Grove) (pop. 860,454) | 13.6 |
| 15. | Mercer County, PA (Sharon, Hermitage, Grove City) (pop. 120,293) | 13.6 |
| 16. | DeKalb County, GA (North Atlanta, Redan, Dunwoody) (pop. 665,865) | 13.3 |
| 17. | San Diego County, CA (San Diego, Chula Vista, Oceanside) (pop. 2,813,833) | 13.1 |
| 18. | Ouachita Parish, LA (Monroe, West Monroe, Claiborne) (pop. 147,250) | 13.1 |
| 19. | St. Bernard Parish, LA (Chalmette, Meraux, Violet) (pop. 67,229) | 13.0 |
| 20. | Delaware County, PA (Chester, Radnor Township, Drexel Hill) (pop. 550,864) | 12.9 |
| 21. | Porter County, IN (Portage, Valparaiso, Chesterton) (pop. 146,798) | 12.9 |
| 22. | St. Joseph County, IN (South Bend, Mishawaka, Granger) (pop. 265,559) | 12.8 |
| 23. | Jefferson County, KY (Louisville, Jeffersontown, Pleasure Ridge Park) (pop. 693,604) | 12.8 |
| 24. | Stanislaus County, CA (Modesto, Turlock, Ceres) (pop. 446,997) | 12.7 |
| 25. | Lancaster County, PA (Lancaster, Ephrata, Elizabethtown) (pop. 470,658) | 12.7 |
| 26. | Madison County, IL (Granite City, Alton, Collinsville) (pop. 258,941) | 12.7 |
| 27. | Imperial County, CA (El Centro, Calexico, Brawley) (pop. 142,361) | 12.7 |
| 28. | Wayne County, NC (Goldsboro, Mount Olive, Elroy) (pop. 113,329) | 12.5 |
| 29. | Madera County, CA (Madera, Oakhurst-North Fork, Chowchilla) (pop. 123,109) | 12.4 |
| 30. | Elkhart County, IN (Elkhart, Goshen, Nappanee) (pop. 182,791) | 12.4 |
| 31. | San Joaquin County, CA (Stockton, Lodi, Tracy) (pop. 563,598) | 12.4 |
| 32. | Tippecanoe County, IN (Lafayette, West Lafayette, Purdue University) (pop. 148,955) | 12.4 |
| 33. | Northampton County, PA (Bethlehem, Easton, Northampton) (pop. 267,066) | 12.3 |
| 34. | Lake County, IN (Gary, Hammond, East Chicago) (pop. 484,564) | 12.2 |
| 35. | El Paso County, TX (El Paso, Socorro, San Elizario) (pop. 679,622) | 12.2 |
| 36. | Cumberland County, PA (Carlisle, Mechanicsburg, Camp Hill) (pop. 213,674) | 12.1 |
| 37. | Cass County, MO (Belton, Raymore, Harrisonville) (pop. 82,092) | 12.1 |
| 38. | Rapides Parish, LA (Alexandria, Pineville, Ball) (pop. 126,337) | 12.0 |
| 39. | Marshall County, WV (Moundsville, McMechen, Benwood) (pop. 35,519) | 11.8 |
| 40. | Philadelphia County, PA (Philadelphia) (pop. 1,517,550) | 11.7 |
| 41. | Blair County, PA (Altoona, Tyrone, Hollidaysburg) (pop. 129,144) | 11.7 |
| 42. | Dallas County, TX (Dallas, Garland, Irving) (pop. 2,218,899) | 11.6 |
| 43. | Vigo County, IN (Terre Haute, North Terre Haute, West Terre Haute) (pop. 105,848) | 11.6 |
| 44. | Dauphin County, PA (Harrisburg, Colonial Park, Hershey) (pop. 251,798) | 11.6 |
| 45. | Cambria County, PA (Johnstown, Westmont, Northern Cambria) (pop. 152,598) | 11.6 |
| 46. | Vanderburgh County, IN (Evansville, Melody Hill, Darmstadt) (pop. 171,922) | 11.5 |
| 47. | Berkeley County, WV (Martinsburg, Inwood, Falling Waters) (pop. 75,905) | 11.4 |
| 48. | Roane County, TN (Harriman, Barnard, Rockwood) (pop. 51,910) | 11.4 |
| 49. | Medina County, OH (Brunswick, Medina, Wadsworth) (pop. 151,095) | 11.3 |
| 50. | Prince George's County, MD (Bowie, Oxon Hill-Glassmanor, Chillum) (pop. 801,515) | 11.3 |
| 51. | Lincoln County, MT (Libby, Eureka, Pioneer Junction) (pop. 18,837) | 11.3 |
| 52. | Erie County, PA (Erie, Northwest Harborcreek, Edinboro) (pop. 280,843) | 11.3 |
| 53. | Clark County, IN (Jeffersonville, Clarksville, Sellersburg) (pop. 96,472) | 11.3 |
| 54. | Silver Bow County, MT (Butte-Silver Bow, Butte, Walkerville) (pop. 34,606) | 11.2 |
| 55. | Pulaski County, AR (Little Rock, North Little Rock, Jacksonville) (pop. 361,474) | 11.2 |
| 56. | Butler County, OH (Hamilton, Middletown, Fairfield) (pop. 332,807) | 11.2 |
| 57. | Plumas County, CA (East Quincy, Chester, Portola) (pop. 20,824) | 11.2 |
| 58. | District of Columbia, DC (Washington) (pop. 572,059) | 11.2 |
| 59. | Hinds County, MS (Jackson, Clinton, Byram) (pop. 250,800) | 11.2 |
| 60. | Kern County, CA (Bakersfield, East Kern, Delano) (pop. 661,645) | 11.2 |
| 61. | Brooke County, WV (Follansbee, Hooverson Heights, Wellsburg) (pop. 25,447) | 11.1 |
| 62. | Cook County, IL (Chicago, Cicero, Arlington Heights) (pop. 5,376,741) | 11.1 |
| 63. | Pittsburg County, OK (McAlester, Twin Cities, North Central Pittsburg) (pop. 43,953) | 11.1 |
| 64. | Bibb County, GA (Macon, Lizella, Rutland) (pop. 153,887) | 11.1 |
| 65. | Harford County, MD (Bel Air South, Bel Air North, Edgewood) (pop. 218,590) | 11.1 |
| 66. | Berks County, PA (Reading, Wyomissing, Blandon) (pop. 373,638) | 11.1 |
| 67. | Buchanan County, MO (St. Joseph, Agency, Rushville) (pop. 85,998) | 11.0 |
| 68. | Adams County, PA (Gettysburg, Littlestown, Carroll Valley) (pop. 91,292) | 11.0 |
| 69. | Missoula County, MT (Missoula, Orchard Homes, Seeley Lake-Blackfoot Valley) (pop. 95,802) | 11.0 |
| 70. | Forrest County, MS (Hattiesburg, Petal, Glendale) (pop. 72,604) | 11.0 |
| 71. | Montgomery County, OH (Dayton, Kettering, Huber Heights) (pop. 559,062) | 11.0 |
| 72. | Duplin County, NC (Wallace, Warsaw, Rose Hill) (pop. 49,063) | 11.0 |
| 73. | Codington County, SD (Watertown, Florence, South Shore) (pop. 25,897) | 11.0 |
| 74. | Centre County, PA (State College, Park Forest Village, Bellefonte) (pop. 135,758) | 11.0 |
| 75. | Stark County, OH (Canton, Massillon, Alliance) (pop. 378,098) | 11.0 |
| 76. | Hamilton County, OH (Cincinnati, Norwood, Forest Park) (pop. 845,303) | 11.0 |
| 77. | Madison County, IN (Anderson, Elwood, Alexandria) (pop. 133,358) | 10.9 |
| 78. | Wilkinson County, GA (Gordon, Ivey, McIntyre) (pop. 10,220) | 10.9 |
| 79. | St. Clair County, IL (Belleville, East St. Louis, O'Fallon) (pop. 256,082) | 10.9 |
| 80. | Union County, AR (El Dorado, Smackover, Norphlet) (pop. 45,629) | 10.9 |
| 81. | Will County, IL (Joliet, Bolingbrook, Homer Glen) (pop. 502,266) | 10.9 |
| 82. | Lawrence County, OH (Ironton, South Point, Burlington) (pop. 62,319) | 10.9 |
| 83. | Bucks County, PA (Levittown, Morrisville, Croydon) (pop. 597,635) | 10.9 |
| 84. | Lee County, IA (Keokuk, Fort Madison, West Point) (pop. 38,052) | 10.9 |
| 85. | Merced County, CA (Merced, Los Banos, Atwater) (pop. 210,554) | 10.9 |
| 86. | St. Louis County, MO (Florissant, Chesterfield, University City) (pop. 1,016,315) | 10.9 |
| 87. | Cuyahoga County, OH (Cleveland, Parma, Lakewood) (pop. 1,393,978) | 10.9 |
| 88. | Dougherty County, GA (Albany, West Dougherty, East Dougherty) (pop. 96,065) | 10.9 |
| 89. | Muscogee County, GA (Columbus, Bibb City) (pop. 186,291) | 10.9 |
| 90. | Caswell County, NC (Yanceyville, Milton) (pop. 23,501) | 10.8 |
| 91. | Daviess County, KY (Owensboro, Masonville, Whitesville) (pop. 91,545) | 10.8 |
| 92. | Westmoreland County, PA (Murrysville, Municipality of Murrysville, Greensburg) (pop. 369,993) | 10.8 |
| 93. | Dubois County, IN (Jasper, Huntingburg, Ferdinand) (pop. 39,674) | 10.8 |
| 94. | Pottawattamie County, IA (Council Bluffs, Carter Lake, Avoca) (pop. 87,704) | 10.8 |
| 95. | Kent County, MD (District 4, Chestertown, Chestertown, Rock Hall) (pop. 19,197) | 10.7 |
| 96. | New Castle County, DE (Brandywine, Wilmington, Greater Newark) (pop. 500,265) | 10.7 |
| 97. | Campbell County, KY (Newport, Fort Thomas, Alexandria) (pop. 88,616) | 10.7 |
| 98. | Clayton County, GA (Forest Park, Riverdale, Irondale) (pop. 236,517) | 10.7 |
| 99. | Union County, NJ (Elizabeth, Union, Plainfield) (pop. 522,541) | 10.7 |
| 100. | Harris County, TX (Houston, Northwest Harris, Pasadena) (pop. 3,400,578) | 10.7 |
| 101. | Cabell County, WV (Huntington, Pea Ridge, Barboursville) (pop. 96,784) | 10.7 |