The following counties satisfy your query:
| County | Population | County Seat | State | Links |
| Polk County, AR | 20229 | Mena | Arkansas | View Public Records for Polk County, AR |
| Polk County, FL | 483924 | Bartow | Florida | View Public Records for Polk County, FL |
| Polk County, GA | 38127 | Cedartown | Georgia | View Public Records for Polk County, GA |
| Polk County, IA | 374601 | Des Moines | Iowa | View Public Records for Polk County, IA |
| Polk County, MN | 31369 | Crookston | Minnesota | View Public Records for Polk County, MN |
| Polk County, MO | 26992 | Bolivar | Missouri | View Public Records for Polk County, MO |
| Polk County, NE | 5639 | Osceola | Nebraska | View Public Records for Polk County, NE |
| Polk County, NC | 18324 | Columbus | North Carolina | View Public Records for Polk County, NC |
| Polk County, OR | 62380 | Dallas | Oregon | View Public Records for Polk County, OR |
| Polk County, TN | 16050 | Benton | Tennessee | View Public Records for Polk County, TN |
| Polk County, TX | 41133 | Livingston | Texas | View Public Records for Polk County, TX |
| Polk County, WI | 41319 | Balsam Lake | Wisconsin | View Public Records for Polk County, WI |