| | Dakota County | NE | 31043 | | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=DakotaCounty+NE |
| | Plymouth County | IA | 19149 | | Le Mars, IA 30180 | Sioux City-Le Mars,
IA-NE-SD 512 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=PlymouthCounty+IA |
| | Union County | SD | 46127 | | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=UnionCounty+SD |
| | Woodbury County | IA | 19193 | | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=WoodburyCounty+IA |