| Atoka | 14,400 | Atoka | Oklahoma | Sherman, TX | View → |
| Attala | 18,000 | Kosciusko | Mississippi | Jackson, MS | View → |
| Audrain | 25,000 | Mexico | Missouri | St. Louis, MO | View → |
| Audubon | 5,600 | Audubon | Iowa | Des Moines, IA | View → |
| Auglaize | 46,400 | Wapakoneta | Ohio | Cincinnati-Dayton, OH | View → |
| Augusta | 77,000 | Staunton | Virginia | Roanoke-Harrisonburg, VA | View → |
| Aurora | 2,700 | Plankinton | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Austin | 30,600 | Sealy | Texas | Houston, TX | View → |
| Autauga | 58,800 | Prattville | Alabama | Montgomery-Dothan, AL | View → |
| Avery | 18,000 | Newland | North Carolina | Charlotte-Greensboro, NC | View → |
| Avoyelles | 41,000 | Marksville | Louisiana | New Orleans-Baton Rouge, LA | View → |
| Baca | 3,500 | Springfield | Colorado | Denver-Colorado Springs, CO | View → |
| Bacon | 12,200 | Alma | Georgia | Savannah-Augusta, GA | View → |
| Bailey | 7,200 | Muleshoe | Texas | Lubbock-Abilene, TX | View → |
| Baker | 29,000 | Macclenny | Florida | Jacksonville-Tallahassee, FL | View → |
| Baker | 3,200 | Newton | Georgia | Jacksonville-Tallahassee, FL | View → |
| Baker | 16,000 | Baker City | Oregon | Portland, OR | View → |
| Baldwin | 45,700 | Milledgeville | Georgia | Macon-Columbus, GA | View → |
| Baldwin | 253,500 | Daphne | Alabama | Mobile, AL-Panama City, FL | View → |
| Ballard | 8,000 | Wickliffe | Kentucky | Paducah, KY | View → |
| Baltimore | 850,000 | Towson | Maryland | Baltimore, MD | View → |
| Baltimore City | 575,000 | Baltimore | Maryland | Baltimore, MD | View → |
| Bamberg | 11,913 | Bamberg | South Carolina | Savannah-Augusta, GA | View → |
| Bandera | 23,000 | Bandera | Texas | San Antonio-Corpus Christi, TX | View → |
| Banks | 20,300 | Homer | Georgia | Atlanta, GA | View → |
| Banner | 760 | Harrisburg | Nebraska | Denver-Colorado Springs, CO | View → |
| Bannock | 89,000 | Pocatello | Idaho | Boise-Pocatello, ID | View → |
| Baraga | 8,000 | L'Anse | Michigan | Marquette, MI | View → |
| Barber | 4,600 | Medicine Lodge | Kansas | Wichita, KS | View → |
| Barbour | 25,200 | Eufaula | Alabama | Macon-Columbus, GA | View → |
| Barbour | 16,000 | Philippi | West Virginia | Wheeling-Clarksburg-Parkersburg, WV | View → |
| Barnes | 10,800 | Valley City | North Dakota | Fargo, ND | View → |
| Barnstable | 213,000 | Barnstable | Massachusetts | Boston-Springfield, MA | View → |
| Barnwell | 20,000 | Barnwell | South Carolina | Savannah-Augusta, GA | View → |
| Barren | 45,000 | Glasgow | Kentucky | Lexington-Bowling Green, KY | View → |
| Barron | 45,000 | Rice Lake | Wisconsin | Minneapolis-St. Paul, MN | View → |
| Barrow | 89,000 | Winder | Georgia | Atlanta, GA | View → |
| Barry | 60,000 | Hastings | Michigan | Grand Rapids, MI | View → |
| Barry | 36,000 | Cassville | Missouri | Springfield, MO | View → |
| Bartholemew | 82,000 | Columbus | Indiana | Indianapolis-Fort Wayne, IN | View → |
| Barton | 12,000 | Lamar | Missouri | Springfield, MO | View → |
| Barton | 26,000 | Great Bend | Kansas | Wichita, KS | View → |
| Bartow | 111,500 | Cartersville | Georgia | Atlanta, GA | View → |
| Bastrop | 95,000 | Bastrop | Texas | Austin-Waco, TX | View → |
| Bates | 17,000 | Butler | Missouri | Kansas City, MO | View → |
| Bath | 12,000 | Owingsville | Kentucky | Lexington-Bowling Green, KY | View → |
| Bath | 4,600 | Hot Springs | Virginia | Roanoke-Harrisonburg, VA | View → |
| Baxter | 42,000 | Mountain Home | Arkansas | Springfield, MO | View → |
| Bay | 103,000 | Bay City | Michigan | Detroit, MI-Toledo, OH | View → |
| Bay | 183,800 | Panama City | Florida | Mobile, AL-Panama City, FL | View → |
