| Boyd | 1,900 | Spencer | Nebraska | Lincoln, NE | View → |
| Boyle | 30,000 | Danville | Kentucky | Lexington-Bowling Green, KY | View → |
| Bracken | 8,500 | Brooksville | Kentucky | Cincinnati-Dayton, OH | View → |
| Bradford | 29,000 | Starke | Florida | Jacksonville-Tallahassee, FL | View → |
| Bradford | 60,000 | Towanda | Pennsylvania | Scranton, PA-Binghamton, NY | View → |
| Bradley | 108,000 | Cleveland | Tennessee | Knoxville-Chattanooga, TN | View → |
| Bradley | 10,000 | Warren | Arkansas | Little Rock, AR | View → |
| Branch | 44,000 | Coldwater | Michigan | Grand Rapids, MI | View → |
| Brantley | 19,500 | Nahunta | Georgia | Jacksonville-Tallahassee, FL | View → |
| Braxton | 12,500 | Sutton | West Virginia | Charleston-Bluefield, WV | View → |
| Brazoria | 400,000 | Pearland | Texas | Houston, TX | View → |
| Brazos | 240,000 | Bryan | Texas | Austin-Waco, TX | View → |
| Breathitt | 13,000 | Jackson | Kentucky | Lexington-Bowling Green, KY | View → |
| Breckinridge | 20,500 | Hardinsburg | Kentucky | Louisville, KY-Evansville, IN | View → |
| Bremer | 24,500 | Waverly | Iowa | Cedar Rapids, IA | View → |
| Brevard | 613,600 | Melbourne | Florida | Orlando-Gainesville, FL | View → |
| Brewster | 9,500 | Alpine | Texas | El Paso-Odessa, TX | View → |
| Briscoe | 1,400 | Silverton | Texas | Amarillo, TX | View → |
| Bristol | 580,000 | Fall River | Massachusetts | Hartford, CT-Providence, RI | View → |
| Bristol | 50,000 | Bristol | Rhode Island | Hartford, CT-Providence, RI | View → |
| Bristol City | 17,000 | Bristol | Virginia | Tri-Cities, TN/VA | View → |
| Broadwater | 6,000 | Townsend | Montana | Missoula-Billings-Butte, MT | View → |
| Bronx | 1,465,000 | Bronx | New York | New York, NY | View → |
| Brooke | 22,000 | Wellsburg | West Virginia | Wheeling-Clarksburg-Parkersburg, WV | View → |
| Brookings | 35,000 | Brookings | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Brooks | 15,500 | Quitman | Georgia | Jacksonville-Tallahassee, FL | View → |
| Brooks | 7,200 | Falfurrias | Texas | San Antonio-Corpus Christi, TX | View → |
| Broome | 188,000 | Binghamton | New York | Scranton, PA-Binghamton, NY | View → |
| Broomfield | 85,000 | Broomfield | Colorado | Denver-Colorado Springs, CO | View → |
| Broward | 1,953,800 | Fort Lauderdale | Florida | Miami-West Palm Beach, FL | View → |
| Brown | 6,500 | Mount Sterling | Illinois | Champaign-Peoria, IL | View → |
| Brown | 44,400 | Georgetown | Ohio | Cincinnati-Dayton, OH | View → |
| Brown | 270,000 | Green Bay | Wisconsin | Green Bay, WI-Duluth, MN | View → |
| Brown | 15,000 | Nashville | Indiana | Indianapolis-Fort Wayne, IN | View → |
| Brown | 9,700 | Hiawatha | Kansas | Kansas City, MO | View → |
| Brown | 2,700 | Ainsworth | Nebraska | Lincoln, NE | View → |
| Brown | 38,000 | Brownwood | Texas | Lubbock-Abilene, TX | View → |
| Brown | 26,000 | New Ulm | Minnesota | Minneapolis-St. Paul, MN | View → |
| Brown | 39,000 | Aberdeen | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Brule | 5,100 | Chamberlain | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Brunswick | 152,000 | Leland | North Carolina | Raleigh-Greenville-Wilmington, NC | View → |
| Brunswick | 15,500 | Lawrenceville | Virginia | Richmond, VA | View → |
| Bryan | 45,000 | Richmond Hill | Georgia | Savannah-Augusta, GA | View → |
| Bryan | 49,000 | Durant | Oklahoma | Sherman, TX | View → |
| Buchanan | 21,000 | Independence | Iowa | Cedar Rapids, IA | View → |
| Buchanan | 22,000 | Grundy | Virginia | Tri-Cities, TN/VA | View → |
| Buchanon | 89,000 | St. Joseph | Missouri | Kansas City, MO | View → |
| Buckingham | 16,500 | Buckingham | Virginia | Richmond, VA | View → |
| Bucks | 630,000 | Doylestown | Pennsylvania | Philadelphia, PA | View → |
| Buena Vista | 19,500 | Storm Lake | Iowa | Omaha, NE-Sioux City, IA | View → |
