| | Alcester city | 4600700 | Union County 46127 | SD | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | | https://maps.google.com/?q=Alcestercity+SD |
| | Beresford city (part) | 4604980 | Union County 46127 | SD | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | | https://maps.google.com/?q=Beresfordcity+SD |
| | Elk Point city | 4618620 | Union County 46127 | SD | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | | https://maps.google.com/?q=ElkPointcity+SD |
| | Jefferson city | 4632700 | Union County 46127 | SD | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | | https://maps.google.com/?q=Jeffersoncity+SD |
| | North Sioux City city | 4645700 | Union County 46127 | SD | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | | https://maps.google.com/?q=NorthSiouxCitycity+SD |