State FIPS Code: 46
County FIPS Code: 135
County FIPS Class: H1
County Description:
| County Office Name | County Office Description | County Office Phone |
|---|---|---|
| Yankton County Equalization Office | Yankton County Equalization Office | (605) 260 - 440 |
| Yankton County Register of Deeds | Yankton County Register of Deeds | (605) 260 - 440 |
| Yankton County Treasurer | Yankton County Treasurer | (605) 260 - 440 |
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