| 1. | Hartford County, CT (Hartford, New Britain, West Hartford) (pop. 857,183) | 93.2% |
| 2. | District of Columbia, DC (Washington) (pop. 572,059) | 91.4% |
| 3. | Bronx County, NY (Bronx) (pop. 1,332,650) | 91.2% |
| 4. | Prince George's County, MD (Bowie, Oxon Hill-Glassmanor, Chillum) (pop. 801,515) | 90.1% |
| 5. | New Haven County, CT (New Haven, Waterbury, Meriden) (pop. 824,008) | 89.3% |
| 6. | Baltimore city, MD (Baltimore) (pop. 651,154) | 87.4% |
| 7. | Starr County, TX (Roma-Los Saenz, Rio Grande City, Roma) (pop. 53,597) | 86.4% |
| 8. | Philadelphia County, PA (Philadelphia) (pop. 1,517,550) | 85.2% |
| 9. | Clayton County, GA (Forest Park, Riverdale, Irondale) (pop. 236,517) | 84.8% |
| 10. | Providence County, RI (Providence, Cranston, Pawtucket) (pop. 621,602) | 84.3% |
| 11. | New York County, NY (New York, Manhattan) (pop. 1,537,195) | 84.2% |
| 12. | San Francisco County, CA (San Francisco) (pop. 776,733) | 83.4% |
| 13. | St. Louis city, MO (St. Louis) (pop. 348,189) | 82.7% |
| 14. | Kings County, NY (Brooklyn) (pop. 2,465,326) | 82.4% |
| 15. | New London County, CT (Norwich, New London, Waterford) (pop. 259,088) | 79.0% |
| 16. | Queens County, NY (Queens) (pop. 2,229,379) | 78.8% |
| 17. | Alameda County, CA (Oakland, Fremont, Hayward) (pop. 1,443,741) | 78.5% |
| 18. | DeKalb County, GA (North Atlanta, Redan, Dunwoody) (pop. 665,865) | 77.9% |
| 19. | Suffolk County, MA (Boston, Revere, Chelsea) (pop. 689,807) | 77.6% |
| 20. | Essex County, NJ (Newark, East Orange, Irvington) (pop. 793,633) | 77.4% |
| 21. | Hudson County, NJ (Jersey City, Union City, Bayonne) (pop. 608,975) | 77.4% |
| 22. | Richmond city, VA (Richmond) (pop. 197,790) | 77.1% |
| 23. | Webb County, TX (Laredo, Bruni-Mirando, Webb) (pop. 193,117) | 76.6% |
| 24. | Durham County, NC (Durham, Gorman, Rougemont) (pop. 223,314) | 75.9% |
| 25. | Multnomah County, OR (Portland, Gresham, Troutdale) (pop. 660,486) | 75.8% |
| 26. | Berkshire County, MA (Pittsfield, North Adams, Dalton) (pop. 134,953) | 75.7% |
| 27. | Santa Cruz County, CA (Santa Cruz, Watsonville, San Lorenzo Valley) (pop. 255,602) | 75.2% |
| 28. | Hawaii County, HI (Hilo, North Kona, South Kohala) (pop. 148,677) | 74.5% |
| 29. | Maui County, HI (Kahului, Kihei, Wailuku) (pop. 128,094) | 74.1% |
| 30. | Marin County, CA (Ross Valley, San Rafael, Northeast Marin) (pop. 247,289) | 74.0% |
| 31. | Cook County, IL (Chicago, Cicero, Arlington Heights) (pop. 5,376,741) | 74.0% |
| 32. | Windham County, CT (Windham, Killingly, Willimantic) (pop. 109,091) | 73.9% |
| 33. | Kauai County, HI (Kapaa, Lihue, Wailua Homesteads) (pop. 58,463) | 73.5% |
| 34. | Denver County, CO (Denver, Holly Hills) (pop. 554,636) | 73.5% |
| 35. | Santa Fe County, NM (Santa Fe, Eldorado at Santa Fe, La Cienega) (pop. 129,292) | 73.4% |
| 36. | Wayne County, MI (Detroit, Livonia, Dearborn) (pop. 2,061,162) | 73.1% |
| 37. | Hinds County, MS (Jackson, Clinton, Byram) (pop. 250,800) | 72.2% |
| 38. | Hampton city, VA (Hampton) (pop. 146,437) | 72.1% |
| 39. | McKinley County, NM (Red Rock, Gallup, Reservation) (pop. 74,798) | 72.1% |
| 40. | Windsor County, VT (Hartford, Springfield, Windsor) (pop. 57,418) | 72.0% |
| 41. | Norfolk city, VA (Norfolk) (pop. 234,403) | 71.4% |
| 42. | Orangeburg County, SC (Orangeburg, Brookdale, Wilkinson Heights) (pop. 91,582) | 71.4% |
| 43. | Alexandria city, VA (Alexandria) (pop. 128,283) | 71.4% |
| 44. | San Mateo County, CA (Daly City, San Mateo, Redwood City) (pop. 707,161) | 71.3% |
| 45. | Dane County, WI (Madison, Fitchburg, Sun Prairie) (pop. 426,526) | 71.1% |
| 46. | Washington County, MS (Greenville, Leland, Hollandale) (pop. 62,977) | 71.1% |
| 47. | Montgomery County, MD (Silver Spring, Wheaton-Glenmont, Germantown) (pop. 873,341) | 70.9% |
| 48. | Sonoma County, CA (Santa Rosa, Petaluma, Rohnert Park) (pop. 458,614) | 70.8% |
| 49. | Orange County, NC (Chapel Hill, Carrboro, Hillsborough) (pop. 118,227) | 70.4% |
| 50. | Hidalgo County, TX (McAllen, Southeast Hidalgo, Edinburg) (pop. 569,463) | 70.4% |
| 51. | Hampshire County, MA (Amherst, Northampton, South Hadley) (pop. 152,251) | 70.3% |
| 52. | Santa Clara County, CA (San Jose, Sunnyvale, Santa Clara) (pop. 1,682,585) | 69.8% |
| 53. | Boulder County, CO (Boulder, Longmont, Lafayette) (pop. 291,288) | 69.6% |
| 54. | Dougherty County, GA (Albany, West Dougherty, East Dougherty) (pop. 96,065) | 69.3% |
| 55. | Portsmouth city, VA (Portsmouth) (pop. 100,565) | 69.3% |
| 56. | Arlington County, VA (Arlington) (pop. 189,453) | 69.2% |
| 57. | Worcester County, MA (Worcester, Leominster, Fitchburg) (pop. 750,963) | 69.0% |
| 58. | Los Angeles County, CA (Los Angeles, East San Gabriel Valley, Long Beach) (pop. 9,519,338) | 68.9% |
| 59. | Honolulu County, HI (Honolulu, Urban Honolulu, Ewa) (pop. 876,156) | 68.9% |
| 60. | Cuyahoga County, OH (Cleveland, Parma, Lakewood) (pop. 1,393,978) | 68.8% |
| 61. | King County, WA (Seattle, East Seattle, Bellevue) (pop. 1,737,034) | 68.8% |
| 62. | Tompkins County, NY (Ithaca, South Hill, Newfield) (pop. 96,501) | 68.2% |
| 63. | Edgecombe County, NC (Tarboro, Pinetops, Princeville) (pop. 55,606) | 68.0% |
| 64. | Mercer County, NJ (Trenton, Ewing, Mercerville-Hamilton Square) (pop. 350,761) | 67.8% |
| 65. | Camden County, NJ (Camden, Pennsauken, Lindenwold) (pop. 508,932) | 67.8% |
| 66. | Washtenaw County, MI (Ann Arbor, Ypsilanti, Saline) (pop. 322,895) | 67.5% |
| 67. | Wyandotte County, KS (Kansas City, Bonner Springs, Edwardsville) (pop. 157,882) | 67.3% |
| 68. | Broward County, FL (Fort Lauderdale, Hollywood, Pembroke Pines) (pop. 1,623,018) | 67.2% |
| 69. | Johnson County, IA (Iowa City, Coralville, North Liberty) (pop. 111,006) | 66.9% |
| 70. | Milwaukee County, WI (Milwaukee, West Allis, Wauwatosa) (pop. 940,164) | 66.8% |
| 71. | Ramsey County, MN (St. Paul, Maplewood, Roseville) (pop. 511,035) | 66.6% |
| 72. | Richmond County, GA (Augusta-Richmond County, Augusta, Gracewood) (pop. 199,775) | 66.5% |
| 73. | Newport County, RI (Newport, Middletown, Portsmouth) (pop. 85,433) | 66.5% |
| 74. | New Castle County, DE (Brandywine, Wilmington, Greater Newark) (pop. 500,265) | 66.3% |
| 75. | Union County, NJ (Elizabeth, Union, Plainfield) (pop. 522,541) | 66.3% |
| 76. | Mendocino County, CA (Ukiah, Redwood-Potter, Fort Bragg) (pop. 86,265) | 66.2% |
| 77. | Athens County, OH (Athens, Nelsonville, The Plains) (pop. 62,223) | 66.1% |
| 78. | Apache County, AZ (Sweetwater, Chinle, Fort Defiance) (pop. 69,423) | 66.1% |
| 79. | Richland County, SC (Columbia, Dutch Fork, Pontiac) (pop. 320,677) | 66.0% |
| 80. | Monterey County, CA (Salinas, Seaside, Monterey) (pop. 401,762) | 65.9% |
| 81. | Halifax County, NC (Roanoke Rapids, South Rosemary, Scotland Neck) (pop. 57,370) | 65.8% |
| 82. | Contra Costa County, CA (Central Contra Costa, West Contra Costa, Concord) (pop. 948,816) | 65.7% |
| 83. | Cameron County, TX (Brownsville, Harlingen, San Benito) (pop. 335,227) | 65.7% |
| 84. | El Paso County, TX (El Paso, Socorro, San Elizario) (pop. 679,622) | 65.6% |
| 85. | Yolo County, CA (Davis, Woodland, East Yolo) (pop. 168,660) | 65.2% |
| 86. | Charles County, MD (St. Charles, Waldorf, District 8, Bryantown) (pop. 120,546) | 65.0% |
| 87. | Lake County, IN (Gary, Hammond, East Chicago) (pop. 484,564) | 64.9% |
| 88. | Liberty County, GA (Hinesville, Walthourville, Midway) (pop. 61,610) | 64.6% |
| 89. | Newport News city, VA (Newport News) (pop. 180,150) | 64.4% |
| 90. | Albany County, NY (Albany, Guilderland, Bethlehem) (pop. 294,565) | 64.4% |
| 91. | Lucas County, OH (Toledo, Oregon, Sylvania) (pop. 455,054) | 64.3% |
| 92. | Fulton County, GA (Atlanta, Sandy Springs, Roswell) (pop. 816,006) | 64.2% |
| 93. | Jefferson County, AR (Pine Bluff, White Hall, Altheimer) (pop. 84,278) | 63.8% |
| 94. | St. Louis County, MN (Duluth, Hibbing, Virginia) (pop. 200,528) | 63.7% |
| 95. | Genesee County, MI (Flint, Burton, Beecher) (pop. 436,141) | 63.6% |
| 96. | Imperial County, CA (El Centro, Calexico, Brawley) (pop. 142,361) | 63.6% |
| 97. | Ingham County, MI (Lansing, East Lansing, Okemos) (pop. 279,320) | 63.4% |
| 98. | Mahoning County, OH (Youngstown, Boardman, Austintown) (pop. 257,555) | 63.2% |
| 99. | Passaic County, NJ (Paterson, Clifton, Passaic) (pop. 489,049) | 63.2% |
| 100. | Clarke County, GA (Athens-Clarke County, Athens, Winterville) (pop. 101,489) | 63.2% |
| 101. | Lackawanna County, PA (Scranton, Dunmore, Carbondale) (pop. 213,295) | 63.1% |