| Business | Phone |
| Campbell County Courthouse Po Box 37, Mound City 57646 | (605) 955-3308 |
| Campbell County Extension 202 Main St N, Mound City 57646 | (605) 955-3305 |
| County Highway Superintendent 111 2nd St Ne, Mound City 57646 | (605) 955-3575 |
| Register Of Deeds 111 2nd St E, Mound City 57646 | (605) 955-3505 |
| Highway Shop Po Box 37, Mound City 57646 | (605) 955-3585 |