| 1. | Ziebach County, SD (Dupree) (pop. 2,519) | 1.2 |
| 2. | Culberson County, TX (Van Horn, Van Horn Rural) (pop. 2,975) | 1.4 |
| 3. | Stanton County, KS (Johnson City, Manter) (pop. 2,406) | 1.4 |
| 4. | Steele County, ND (Finley, Hope, Sharon) (pop. 2,258) | 1.5 |
| 5. | San Miguel County, CO (Telluride, Mountain Village, Norwood) (pop. 6,594) | 1.5 |
| 6. | Rich County, UT (Randolph, Garden City, Woodruff) (pop. 1,961) | 1.6 |
| 7. | Summit County, CO (Silverthorne, Frisco, Breckenridge) (pop. 23,548) | 1.9 |
| 8. | Eagle County, CO (Edwards, Avon, Vail) (pop. 41,659) | 2.0 |
| 9. | Wallace County, KS (Sharon Springs, Weskan, Wallace) (pop. 1,749) | 2.0 |
| 10. | Piute County, UT (Circleville, Marysvale, Junction) (pop. 1,435) | 2.1 |
| 11. | Issaquena County, MS (Mayersville) (pop. 2,274) | 2.1 |
| 12. | Campbell County, SD (Herreid, Pollock, Mound City) (pop. 1,782) | 2.1 |
| 13. | Skagway-Hoonah-Angoon Census Area, AK (Skagway, Hoonah, Angoon) (pop. 3,436) | 2.2 |
| 14. | Stanley County, SD (Fort Pierre) (pop. 2,772) | 2.3 |
| 15. | Motley County, TX (Matador, Roaring Springs) (pop. 1,426) | 2.6 |
| 16. | Pitkin County, CO (Aspen, Snowmass Village, Woody Creek) (pop. 14,872) | 2.7 |
| 17. | Haines Borough, AK (Haines, Mosquito Lake, Klukwan) (pop. 2,392) | 2.7 |
| 18. | Hudspeth County, TX (Fort Hancock, Sierra Blanca, Dell City) (pop. 3,344) | 2.7 |
| 19. | Chattahoochee County, GA (Fort Benning, Fort Benning South, Cusseta) (pop. 14,882) | 2.7 |
| 20. | Sterling County, TX (Sterling City) (pop. 1,393) | 2.8 |
| 21. | Edwards County, TX (Rocksprings) (pop. 2,162) | 3.0 |
| 22. | Manassas Park city, VA (pop. 10,290) | 3.1 |
| 23. | Douglas County, CO (Highlands Ranch, Parker, Castle Rock) (pop. 175,766) | 3.1 |
| 24. | Loudoun County, VA (Ashburn, Leesburg, Sterling) (pop. 169,599) | 3.2 |
| 25. | Jeff Davis County, TX (Fort Davis, Valentine) (pop. 2,207) | 3.2 |
| 26. | Mono County, CA (Mammoth Lakes, Crowley Lake, Walker) (pop. 12,853) | 3.2 |
| 27. | Eureka County, NV (Eureka, Beowawe, Crescent Valley) (pop. 1,651) | 3.3 |
| 28. | Buffalo County, SD (Fort Thompson, Gann Valley) (pop. 2,032) | 3.3 |
| 29. | Dolores County, CO (Dove Creek, Rico) (pop. 1,844) | 3.3 |
| 30. | Madison County, ID (Thornton, Rexburg, Moody Creek) (pop. 27,467) | 3.4 |
| 31. | Teton County, ID (Driggs, Victor, Tetonia) (pop. 5,999) | 3.4 |
| 32. | Sherman County, OR (Wasco, Moro, Rufus) (pop. 1,934) | 3.5 |
| 33. | Webster County, GA (Preston, Weston) (pop. 2,390) | 3.6 |
| 34. | Teton County, WY (Jackson Hole, Jackson, Hoback) (pop. 18,251) | 3.6 |
| 35. | Summit County, UT (Park City, Summit Park, Snyderville) (pop. 29,736) | 3.6 |
| 36. | Golden Valley County, ND (Beach, Golva, Sentinel Butte) (pop. 1,924) | 3.7 |
| 37. | Wibaux County, MT (Wibaux, Pine Hills-St. Phillips) (pop. 1,068) | 3.8 |
| 38. | Frontier County, NE (Curtis, Eustis, Maywood) (pop. 3,099) | 3.8 |
| 39. | Grand County, CO (Kremmling, Granby, Fraser) (pop. 12,442) | 3.8 |
| 40. | Prince William County, VA (Dale City, Manassas, Marumsco) (pop. 280,813) | 3.8 |
| 41. | Fort Bend County, TX (Sugar Land, Missouri City, Mission Bend) (pop. 354,452) | 3.9 |
| 42. | Utah County, UT (Provo, Orem, Pleasant Grove) (pop. 368,536) | 3.9 |
| 43. | Collin County, TX (Plano, McKinney, Allen) (pop. 491,675) | 4.0 |
| 44. | Routt County, CO (Steamboat Springs, Hayden, Oak Creek) (pop. 19,690) | 4.0 |
| 45. | Scott County, MN (Savage, Shakopee, Prior Lake) (pop. 89,498) | 4.1 |
| 46. | Denton County, TX (Denton, Lewisville, Flower Mound) (pop. 432,976) | 4.1 |
| 47. | Kendall County, IL (Oswego, Boulder Hill, Yorkville) (pop. 54,544) | 4.1 |
| 48. | Gunnison County, CO (Gunnison, Crested Butte, Mount Crested Butte) (pop. 13,956) | 4.1 |
| 49. | Gwinnett County, GA (Dacula-Rocky Creek, Lawrenceville, Duluth) (pop. 588,448) | 4.1 |
| 50. | Fairbanks North Star Borough, AK (Fairbanks, Badger, College) (pop. 82,840) | 4.2 |
| 51. | Cache County, UT (Logan, Smithfield, Hyrum) (pop. 91,391) | 4.2 |
| 52. | Briscoe County, TX (Silverton, Quitaque) (pop. 1,790) | 4.2 |
| 53. | Blaine County, ID (Hailey, Ketchum, Bellevue) (pop. 18,991) | 4.2 |
| 54. | Fairfax County, VA (Burke, Reston, Annandale) (pop. 969,749) | 4.3 |
| 55. | Forsyth County, GA (Big Creek, Chestatee, Silver City) (pop. 98,407) | 4.4 |
| 56. | Riley County, KS (Manhattan, Fort Riley North, Ogden) (pop. 62,843) | 4.4 |
| 57. | Wasatch County, UT (Heber, Midway, Daniel) (pop. 15,215) | 4.4 |
| 58. | Lincoln County, SD (Canton, Lennox, Tea) (pop. 24,131) | 4.4 |
| 59. | Brazos County, TX (College Station, Bryan, South Brazos) (pop. 152,415) | 4.4 |
| 60. | Stafford County, VA (Aquia Harbour, Stafford Courthouse, Falmouth) (pop. 92,446) | 4.5 |
| 61. | Kodiak Island Borough, AK (Kodiak, Kodiak Station, Womens Bay) (pop. 13,913) | 4.5 |
| 62. | Williamson County, TX (Round Rock, Georgetown, Cedar Park) (pop. 249,967) | 4.5 |
| 63. | Travis County, TX (Austin, Pflugerville, Wells Branch) (pop. 812,280) | 4.5 |
| 64. | Franklin County, WA (Pasco, West Pasco, Connell) (pop. 49,347) | 4.5 |
| 65. | Arlington County, VA (Arlington) (pop. 189,453) | 4.5 |
| 66. | Carver County, MN (Chanhassen, Chaska, Waconia) (pop. 70,205) | 4.6 |
| 67. | Liberty County, GA (Hinesville, Walthourville, Midway) (pop. 61,610) | 4.6 |
| 68. | Wheeler County, OR (Fossil, Mitchell, Spray) (pop. 1,547) | 4.6 |
| 69. | Hamilton County, IN (Fishers, Carmel, Noblesville) (pop. 182,740) | 4.6 |
| 70. | Park County, CO (Lake George, Fairplay, Alma) (pop. 14,523) | 4.6 |
| 71. | Hidalgo County, TX (McAllen, Southeast Hidalgo, Edinburg) (pop. 569,463) | 4.7 |
| 72. | Webb County, TX (Laredo, Bruni-Mirando, Webb) (pop. 193,117) | 4.7 |
| 73. | Howard County, MD (Columbia, Ellicott City, Scaggsville) (pop. 247,842) | 4.7 |
| 74. | Johnson County, IA (Iowa City, Coralville, North Liberty) (pop. 111,006) | 4.7 |
| 75. | Davis County, UT (North Davis, South Davis, Layton) (pop. 238,994) | 4.7 |
| 76. | Manassas city, VA (pop. 35,135) | 4.8 |
| 77. | Wake County, NC (Raleigh, Cary, Apex) (pop. 627,846) | 4.8 |
| 78. | North Slope Borough, AK (Barrow, Point Hope, Wainwright) (pop. 7,385) | 4.9 |
| 79. | Sarpy County, NE (Bellevue, Papillion, La Vista) (pop. 122,595) | 4.9 |
| 80. | Elbert County, CO (Ponderosa Park, Elizabeth, Simla) (pop. 19,872) | 4.9 |
| 81. | Paulding County, GA (Huntsville, Yorkville, Dallas) (pop. 81,678) | 4.9 |
| 82. | Hanson County, SD (Alexandria, Emery, Fulton) (pop. 3,139) | 4.9 |
| 83. | Sublette County, WY (Pinedale, Marbleton, Big Piney) (pop. 5,920) | 5.0 |
| 84. | Ouray County, CO (Ouray, Ridgway, Loghill Village) (pop. 3,742) | 5.0 |
| 85. | Gilpin County, CO (Central City, Rollinsville, Black Hawk) (pop. 4,757) | 5.0 |
| 86. | Garfield County, CO (Glenwood Springs, Rifle, Carbondale) (pop. 43,791) | 5.0 |
| 87. | Anoka County, MN (Coon Rapids, Blaine, Fridley) (pop. 298,084) | 5.0 |
| 88. | Anchorage Municipality, AK (Anchorage) (pop. 260,283) | 5.0 |
| 89. | Onslow County, NC (Jacksonville, Piney Green, Half Moon) (pop. 150,355) | 5.0 |
| 90. | Hays County, TX (San Marcos, Kyle, Wimberley) (pop. 97,589) | 5.0 |
| 91. | Hodgeman County, KS (Jetmore, Hanston) (pop. 2,085) | 5.0 |
| 92. | Delaware County, OH (Delaware, Powell, Sunbury) (pop. 109,989) | 5.0 |
| 93. | San Benito County, CA (Hollister, Aromas, Ridgemark) (pop. 53,234) | 5.0 |
| 94. | Judith Basin County, MT (Geyser, Stanford, Hobson) (pop. 2,329) | 5.1 |
| 95. | Sherburne County, MN (Elk River, Big Lake, Zimmerman) (pop. 64,417) | 5.1 |
| 96. | Harrisonburg city, VA (pop. 40,468) | 5.1 |
| 97. | Albany County, WY (Laramie, South Albany, Rock River) (pop. 32,014) | 5.1 |
| 98. | Tooele County, UT (Tooele, Grantsville, Erda) (pop. 40,735) | 5.1 |
| 99. | Williamson County, TN (Franklin, Brentwood, Boston) (pop. 126,638) | 5.1 |
| 100. | Santa Clara County, CA (San Jose, Sunnyvale, Santa Clara) (pop. 1,682,585) | 5.1 |
| 101. | Jefferson County, ID (Rigby, Menan, Roberts) (pop. 19,155) | 5.1 |