| Bienville | 13,000 | Arcadia | Louisiana | Shreveport, LA | View → |
| Big Horn | 13,000 | Hardin | Montana | Missoula-Billings-Butte, MT | View → |
| Big Horn | 11,500 | Basin | Wyoming | Missoula-Billings-Butte, MT | View → |
| Big Stone | 5,000 | Ortonville | Minnesota | Minneapolis-St. Paul, MN | View → |
| Billings | 1,000 | Medora | North Dakota | Bismarck, ND | View → |
| Bingham | 48,000 | Blackfoot | Idaho | Boise-Pocatello, ID | View → |
| Black Hawk | 133,000 | Waterloo | Iowa | Cedar Rapids, IA | View → |
| Blackford | 12,000 | Hartford City | Indiana | Indianapolis-Fort Wayne, IN | View → |
| Bladen | 30,500 | Elizabethtown | North Carolina | Raleigh-Greenville-Wilmington, NC | View → |
| Blaine | 24,000 | Hailey | Idaho | Boise-Pocatello, ID | View → |
| Blaine | 480 | Dunning | Nebraska | Lincoln, NE | View → |
| Blaine | 7,000 | Chinook | Montana | Missoula-Billings-Butte, MT | View → |
| Blaine | 9,400 | Watonga | Oklahoma | Oklahoma City, OK | View → |
| Blair | 121,000 | Altoona | Pennsylvania | Johnstown-Altoona-State College, PA | View → |
| Blanco | 12,200 | Johnson City | Texas | Austin-Waco, TX | View → |
| Bland | 6,500 | Bland | Virginia | Charleston-Bluefield, WV | View → |
| Bleckley | 13,200 | Cochran | Georgia | Macon-Columbus, GA | View → |
| Bledsoe | 15,000 | Pikeville | Tennessee | Knoxville-Chattanooga, TN | View → |
| Blount | 59,100 | Oneonta | Alabama | Birmingham-Huntsville, AL | View → |
| Blount | 135,000 | Maryville | Tennessee | Knoxville-Chattanooga, TN | View → |
| Blue Earth | 70,000 | Mankato | Minnesota | Minneapolis-St. Paul, MN | View → |
| Boise | 7,500 | Idaho City | Idaho | Boise-Pocatello, ID | View → |
| Bolivar | 31,000 | Cleveland | Mississippi | Tupelo-Meridian-Greenwood, MS | View → |
| Bollinger | 12,500 | Marble Hill | Missouri | Paducah, KY | View → |
| Bon Homme | 6,700 | Tyndall | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Bond | 17,000 | Greenville | Illinois | St. Louis, MO | View → |
| Bonner | 49,000 | Sandpoint | Idaho | Spokane, WA | View → |
| Bonneville | 125,000 | Idaho Falls | Idaho | Boise-Pocatello, ID | View → |
| Boone | 21,000 | Madison | West Virginia | Charleston-Bluefield, WV | View → |
| Boone | 54,000 | Belvidere | Illinois | Chicago, IL | View → |
| Boone | 140,000 | Florence | Kentucky | Cincinnati-Dayton, OH | View → |
| Boone | 27,000 | Boone | Iowa | Des Moines, IA | View → |
| Boone | 70,000 | Lebanon | Indiana | Indianapolis-Fort Wayne, IN | View → |
| Boone | 5,400 | Albion | Nebraska | Lincoln, NE | View → |
| Boone | 38,000 | Harrison | Arkansas | Springfield, MO | View → |
| Boone | 190,000 | Columbia | Missouri | St. Louis, MO | View → |
| Borden | 650 | Gail | Texas | Lubbock-Abilene, TX | View → |
| Bosque | 18,400 | Clifton | Texas | Dallas-Fort Worth, TX | View → |
| Bossier | 128,000 | Bossier City | Louisiana | Shreveport, LA | View → |
| Botetourt | 34,000 | Fincastle | Virginia | Roanoke-Harrisonburg, VA | View → |
| Bottineau | 6,400 | Bottineau | North Dakota | Bismarck, ND | View → |
| Boulder | 330,000 | Boulder | Colorado | Denver-Colorado Springs, CO | View → |
| Boundary | 12,000 | Bonners Ferry | Idaho | Spokane, WA | View → |
| Bourbon | 20,000 | Paris | Kentucky | Lexington-Bowling Green, KY | View → |
| Bourbon | 14,500 | Fort Scott | Kansas | Wichita, KS | View → |
| Bowie | 94,200 | Texarkana | Texas | Shreveport, LA | View → |
| Bowman | 3,100 | Bowman | North Dakota | Bismarck, ND | View → |
| Box Butte | 10,500 | Alliance | Nebraska | Denver-Colorado Springs, CO | View → |
| Box Elder | 59,000 | Brigham City | Utah | Salt Lake City, UT | View → |
| Boyd | 47,000 | Ashland | Kentucky | Charleston-Bluefield, WV | View → |
