| Hubbard | 22,000 | Park Rapids | Minnesota | Minneapolis-St. Paul, MN | View → |
| Hudson | 692,374 | Jersey City | New Jersey | New York, NY | View → |
| Hudspeth | 4,500 | Sierra Blanca | Texas | El Paso-Odessa, TX | View → |
| Huerfano | 6,500 | Walsenburg | Colorado | Denver-Colorado Springs, CO | View → |
| Hughes | 13,500 | Holdenville | Oklahoma | Oklahoma City, OK | View → |
| Hughes | 18,100 | Pierre | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Humboldt | 9,700 | Dakota City | Iowa | Des Moines, IA | View → |
| Humboldt | 17,025 | Winnemucca | Nevada | Las Vegas-Reno, NV | View → |
| Humboldt | 135,000 | Eureka | California | San Francisco, CA | View → |
| Humphreys | 8,200 | Belzoni | Mississippi | Jackson, MS | View → |
| Humphreys | 18,500 | Waverly | Tennessee | Nashville, TN | View → |
| Hunt | 99,000 | Greenville | Texas | Dallas-Fort Worth, TX | View → |
| Hunterdon | 124,371 | Flemington | New Jersey | New York, NY | View → |
| Huntingdon | 44,200 | Huntingdon | Pennsylvania | Johnstown-Altoona-State College, PA | View → |
| Huntington | 36,500 | Huntington | Indiana | Indianapolis-Fort Wayne, IN | View → |
| Huron | 57,630 | Norwalk | Ohio | Cleveland-Youngstown, OH | View → |
| Huron | 32,000 | Bad Axe | Michigan | Detroit, MI-Toledo, OH | View → |
| Hutchinson | 20,600 | Borger | Texas | Amarillo, TX | View → |
| Hutchinson | 7,300 | Parkston | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Hyde | 5,000 | Swan Quarter | North Carolina | Raleigh-Greenville-Wilmington, NC | View → |
| Hyde | 1,300 | Highmore | South Dakota | Sioux Falls-Rapid City, SD | View → |
| Iberia | 70,000 | New Iberia | Louisiana | New Orleans-Baton Rouge, LA | View → |
| Iberville | 33,000 | Plaquemine | Louisiana | New Orleans-Baton Rouge, LA | View → |
| Ida | 7,000 | Ida Grove | Iowa | Omaha, NE-Sioux City, IA | View → |
| Idaho | 17,000 | Grangeville | Idaho | Spokane, WA | View → |
| Imperial | 200,000 | El Centro | California | Los Angeles-San Diego, CA | View → |
| Independence | 38,000 | Batesville | Arkansas | Little Rock, AR | View → |
| Indian River | 169,900 | Vero Beach | Florida | Miami-West Palm Beach, FL | View → |
| Indiana | 83,500 | Indiana | Pennsylvania | Pittsburgh-Erie, PA | View → |
| Ingham | 295,000 | Lansing | Michigan | Detroit, MI-Toledo, OH | View → |
| Inyo | 18,000 | Bishop | California | Los Angeles-San Diego, CA | View → |
| Ionia | 64,000 | Ionia | Michigan | Grand Rapids, MI | View → |
| Iosco | 25,000 | Tawas City | Michigan | Traverse City, MI | View → |
| Iowa | 16,500 | Marengo | Iowa | Cedar Rapids, IA | View → |
| Iowa | 23,000 | Dodgeville | Wisconsin | Madison-La Crosse, WI | View → |
| Iredell | 190,000 | Statesville | North Carolina | Charlotte-Greensboro, NC | View → |
| Irion | 1,600 | Mertzon | Texas | El Paso-Odessa, TX | View → |
| Iron | 5,700 | Hurley | Wisconsin | Green Bay, WI-Duluth, MN | View → |
| Iron | 11,500 | Crystal Falls | Michigan | Marquette, MI | View → |
| Iron | 58,000 | Cedar City | Utah | Salt Lake City, UT | View → |
| Iron | 10,000 | Ironton | Missouri | St. Louis, MO | View → |
| Iroquois | 27,000 | Watseka | Illinois | Champaign-Peoria, IL | View → |
| Irwin | 9,500 | Ocilla | Georgia | Macon-Columbus, GA | View → |
| Isabella | 70,000 | Mount Pleasant | Michigan | Grand Rapids, MI | View → |
| Isanti | 40,000 | Cambridge | Minnesota | Minneapolis-St. Paul, MN | View → |
| Island | 87,000 | Oak Harbor | Washington | Seattle, WA | View → |
| Isle of Wight | 39,000 | Smithfield | Virginia | Norfolk, VA-Salisbury, MD | View → |
| Issaquena | 1,400 | Mayersville | Mississippi | Jackson, MS | View → |
| Itasca | 45,000 | Grand Rapids | Minnesota | Green Bay, WI-Duluth, MN | View → |
| Itawamba | 23,000 | Fulton | Mississippi | Tupelo-Meridian-Greenwood, MS | View → |
