| City | Region | Country | Time Zone | Population | |
|---|---|---|---|---|---|
| Plainview | Texas | United States | Central Daylight Time | 20,919 | |
| Grayslake | Illinois | United States | Central Daylight Time | 20,915 | |
| Agoura Hills | California | United States | Pacific Daylight Time | 20,915 | |
| Acton | Massachusetts | United States | Eastern Daylight Time | 20,897 | |
| Sanford | Maine | United States | Eastern Daylight Time | 20,893 | |
| Silver Firs | Washington | United States | Pacific Daylight Time | 20,891 | |
| Hauppauge | New York | United States | Eastern Daylight Time | 20,882 | |
| Kihei | Hawaii | United States | Hawaii-Aleutian Standard Time | 20,881 | |
| South El Monte | California | United States | Pacific Daylight Time | 20,878 | |
| Arvin | California | United States | Pacific Daylight Time | 20,876 | |
| Johnston | Iowa | United States | Central Daylight Time | 20,871 | |
| Gardner | Kansas | United States | Central Daylight Time | 20,868 | |
| Lathrop | California | United States | Pacific Daylight Time | 20,866 | |
| Ashland | Oregon | United States | Pacific Daylight Time | 20,861 | |
| Sidney | Ohio | United States | Eastern Daylight Time | 20,858 | |
| Birmingham | Michigan | United States | Eastern Daylight Time | 20,857 | |
| Sweetwater | Florida | United States | Eastern Daylight Time | 20,840 | |
| Milwaukie | Oregon | United States | Pacific Daylight Time | 20,830 | |
| East Millcreek | Utah | United States | Mountain Daylight Time | 20,816 | |
| Grand Island | New York | United States | Eastern Daylight Time | 20,813 |
