| Morrow | 35,000 | Mount Gilead | Ohio | Columbus, OH | View → |
| Morrow | 12,000 | Boardman | Oregon | Portland, OR | View → |
| Morton | 2,800 | Elkhart | Kansas | Amarillo, TX | View → |
| Morton | 32,000 | Mandan | North Dakota | Bismarck, ND | View → |
| Motley | 1,200 | Matador | Texas | Lubbock-Abilene, TX | View → |
| Moultrie | 14,500 | Sullivan | Illinois | Champaign-Peoria, IL | View → |
| Mountrail | 11,000 | Stanley | North Dakota | Bismarck, ND | View → |
| Mower | 40,000 | Austin | Minnesota | Minneapolis-St. Paul, MN | View → |
| Muhlenberg | 31,000 | Central City | Kentucky | Louisville, KY-Evansville, IN | View → |
| Multnomah | 825,000 | Portland | Oregon | Portland, OR | View → |
| Murray | 40,000 | Chatsworth | Georgia | Knoxville-Chattanooga, TN | View → |
| Murray | 14,000 | Sulphur | Oklahoma | Oklahoma City, OK | View → |
| Murray | 8,300 | Slayton | Minnesota | Sioux Falls-Rapid City, SD | View → |
| Muscatine | 43,000 | Muscatine | Iowa | Davenport, IA-Moline, IL | View → |
| Muscogee | 200,000 | Columbus | Georgia | Macon-Columbus, GA | View → |
| Muskegon | 175,000 | Muskegon | Michigan | Grand Rapids, MI | View → |
| Muskingum | 86,000 | Zanesville | Ohio | Columbus, OH | View → |
| Muskogee | 67,000 | Muskogee | Oklahoma | Tulsa, OK-Fort Smith, AR | View → |
| Musselshell | 4,600 | Roundup | Montana | Missoula-Billings-Butte, MT | View → |
| Nacogdoches | 64,000 | Nacogdoches | Texas | Dallas-Fort Worth, TX | View → |
| Nance | 3,800 | Fullerton | Nebraska | Lincoln, NE | View → |
| Nantucket | 14,000 | Nantucket | Massachusetts | Boston-Springfield, MA | View → |
| Napa | 141,600 | Napa | California | San Francisco, CA | View → |
| Nash | 94,000 | Rocky Mount | North Carolina | Raleigh-Greenville-Wilmington, NC | View → |
| Nassau | 98,000 | Fernandina Beach | Florida | Jacksonville-Tallahassee, FL | View → |
| Nassau | 1,300,000 | Hempstead | New York | New York, NY | View → |
| Natchitoches | 38,000 | Natchitoches | Louisiana | Shreveport, LA | View → |
| Natrona | 80,000 | Casper | Wyoming | Casper, WY | View → |
| Navajo | 113,000 | Holbrook | Arizona | Phoenix-Tuscon, AZ | View → |
| Navarro | 51,500 | Corsicana | Texas | Dallas-Fort Worth, TX | View → |
| Nelson | 3,000 | Lakota | North Dakota | Fargo, ND | View → |
| Nelson | 46,000 | Bardstown | Kentucky | Louisville, KY-Evansville, IN | View → |
| Nelson | 15,000 | Lovingston | Virginia | Roanoke-Harrisonburg, VA | View → |
| Nemaha | 10,100 | Seneca | Kansas | Kansas City, MO | View → |
| Nemaha | 7,000 | Auburn | Nebraska | Omaha, NE-Sioux City, IA | View → |
| Neosho | 15,500 | Chanute | Kansas | Wichita, KS | View → |
| Neshoba | 29,000 | Philadelphia | Mississippi | Tupelo-Meridian-Greenwood, MS | View → |
| Ness | 3,000 | Ness City | Kansas | Wichita, KS | View → |
| Nevada | 103,700 | Nevada City | California | Sacramento, CA | View → |
| Nevada | 8,200 | Prescott | Arkansas | Shreveport, LA | View → |
| New Castle | 573,500 | Wilmington | Delaware | Philadelphia, PA | View → |
| New Hanover | 240,000 | Wilmington | North Carolina | Raleigh-Greenville-Wilmington, NC | View → |
| New Haven | 854,600 | New Haven | Connecticut | Hartford, CT-Providence, RI | View → |
| New Kent | 25,000 | New Kent | Virginia | Richmond, VA | View → |
| New London | 268,600 | Norwich | Connecticut | Hartford, CT-Providence, RI | View → |
| New Madrid | 18,000 | New Madrid | Missouri | Paducah, KY | View → |
| New York | 1,732,500 | Manhattan | New York | New York, NY | View → |
| Newaygo | 49,000 | Fremont | Michigan | Grand Rapids, MI | View → |
| Newberry | 39,000 | Newberry | South Carolina | Columbia, SC | View → |
| Newport | 85,000 | Newport | Rhode Island | Hartford, CT-Providence, RI | View → |
