| Sioux | 4,200 | Fort Yates | North Dakota | Bismarck, ND | View → |
| Sioux | 1,300 | Harrison | Nebraska | Denver-Colorado Springs, CO | View → |
| Slope | 800 | Amidon | North Dakota | Bismarck, ND | View → |
| Smith | 245,000 | Tyler | Texas | Dallas-Fort Worth, TX | View → |
| Socorro | 18,500 | Socorro | New Mexico | Albuquerque, NM | View → |
| Somervell | 9,000 | Glen Rose | Texas | Dallas-Fort Worth, TX | View → |
| Spalding | 68,000 | Griffin | Georgia | Atlanta, GA | View → |
| St. Clair | 94,400 | Pell City | Alabama | Birmingham-Huntsville, AL | View → |
| St. Clair | 160,000 | Port Huron | Michigan | Detroit, MI-Toledo, OH | View → |
| St. Joseph | 270,000 | South Bend | Indiana | Chicago, IL | View → |
| St. Joseph | 62,000 | Three Rivers | Michigan | Grand Rapids, MI | View → |
| St. Lawrence | 108,000 | Potsdam | New York | Albany-Utica-Elmira, NY | View → |
| St. Louis | 199,000 | Duluth | Minnesota | Green Bay, WI-Duluth, MN | View → |
| Stanly | 65,000 | Albemarle | North Carolina | Charlotte-Greensboro, NC | View → |
| Stark | 32,000 | Dickinson | North Dakota | Bismarck, ND | View → |
| Stark | 5,900 | Toulon | Illinois | Champaign-Peoria, IL | View → |
| Stark | 370,000 | Canton | Ohio | Cleveland-Youngstown, OH | View → |
| Starke | 23,000 | Knox | Indiana | Chicago, IL | View → |
| Steele | 2,000 | Finley | North Dakota | Fargo, ND | View → |
| Stephens | 26,000 | Toccoa | Georgia | Greenville, SC-Asheville, NC | View → |
| Stephenson | 45,000 | Freeport | Illinois | Chicago, IL | View → |
| Sterling | 1,300 | Sterling City | Texas | El Paso-Odessa, TX | View → |
| Stokes | 45,000 | King | North Carolina | Charlotte-Greensboro, NC | View → |
| Story | 98,000 | Ames | Iowa | Des Moines, IA | View → |
| Strafford | 130,000 | Dover | New Hampshire | Boston-Springfield, MA | View → |
| Stutsman | 21,000 | Jamestown | North Dakota | Fargo, ND | View → |
| Suffolk | 820,000 | Boston | Massachusetts | Boston-Springfield, MA | View → |
| Sullivan | 44,000 | Claremont | New Hampshire | Burlington, VT | View → |
| Summers | 12,000 | Hinton | West Virginia | Charleston-Bluefield, WV | View → |
| Summit | 540,000 | Akron | Ohio | Cleveland-Youngstown, OH | View → |
| Summit | 32,000 | Breckenridge | Colorado | Denver-Colorado Springs, CO | View → |
| Sumter | 12,700 | Livingston | Alabama | Birmingham-Huntsville, AL | View → |
| Sumter | 105,000 | Sumter | South Carolina | Columbia, SC | View → |
| Surry | 72,000 | Mount Airy | North Carolina | Charlotte-Greensboro, NC | View → |
| Sutton | 3,500 | Sonora | Texas | El Paso-Odessa, TX | View → |
| Swain | 15,000 | Bryson City | North Carolina | Greenville, SC-Asheville, NC | View → |
| Swisher | 7,500 | Tulia | Texas | Amarillo, TX | View → |
| Switzerland | 11,000 | Vevay | Indiana | Cincinnati-Dayton, OH | View → |
| Talbot | 37,000 | Easton | Maryland | Baltimore, MD | View → |
| Talladega | 80,700 | Talladega | Alabama | Birmingham-Huntsville, AL | View → |
| Tama | 17,000 | Toledo | Iowa | Cedar Rapids, IA | View → |
| Taos | 34,000 | Taos | New Mexico | Albuquerque, NM | View → |
| Tarrant | 2,100,000 | Fort Worth | Texas | Dallas-Fort Worth, TX | View → |
| Taylor | 6,100 | Bedford | Iowa | Des Moines, IA | View → |
| Taylor | 20,500 | Medford | Wisconsin | Green Bay, WI-Duluth, MN | View → |
| Tazewell | 132,000 | Pekin | Illinois | Champaign-Peoria, IL | View → |
| Tazewell | 40,000 | Tazewell | Virginia | Charleston-Bluefield, WV | View → |
| Teller | 27,000 | Woodland Park | Colorado | Denver-Colorado Springs, CO | View → |
| Terrell | 800 | Sanderson | Texas | El Paso-Odessa, TX | View → |
| Teton | 12,000 | Driggs | Idaho | Boise-Pocatello, ID | View → |
