| City | Region | Country | Time Zone | Population | |
|---|---|---|---|---|---|
| Elko | Nevada | United States | Pacific Daylight Time | 20,279 | |
| Hollis | New York | United States | Eastern Daylight Time | 20,269 | |
| Brooklyn Heights | New York | United States | Eastern Daylight Time | 20,256 | |
| Nogales | Arizona | United States | Mountain Standard Time | 20,252 | |
| Parma Heights | Ohio | United States | Eastern Daylight Time | 20,246 | |
| La Canada Flintridge | California | United States | Pacific Daylight Time | 20,246 | |
| Mustang | Oklahoma | United States | Central Daylight Time | 20,226 | |
| Rose Hill | Virginia | United States | Eastern Daylight Time | 20,226 | |
| East Northport | New York | United States | Eastern Daylight Time | 20,217 | |
| Glen Avon | California | United States | Pacific Daylight Time | 20,199 | |
| Sulphur | Louisiana | United States | Central Daylight Time | 20,189 | |
| Shelby | North Carolina | United States | Eastern Daylight Time | 20,189 | |
| Montville Center | Connecticut | United States | Eastern Daylight Time | 20,180 | |
| Ferndale | Michigan | United States | Eastern Daylight Time | 20,177 | |
| South Saint Paul | Minnesota | United States | Central Daylight Time | 20,160 | |
| Lynn Haven | Florida | United States | Central Daylight Time | 20,156 | |
| Lents | Oregon | United States | Pacific Daylight Time | 20,156 | |
| Lake Ronkonkoma | New York | United States | Eastern Daylight Time | 20,155 | |
| Millburn | New Jersey | United States | Eastern Daylight Time | 20,149 | |
| Lexington | South Carolina | United States | Eastern Daylight Time | 20,138 |

