| Business | Phone |
| Codington Cnty Register-Deeds 14 1st Ave Se, Watertown 57201 | (605) 882-6278 |
| Codington County Commissioner 16 1st Ave Se, Watertown 57201 | (605) 882-6288 |
| Codington County Equalization 14 1st Ave Se, Watertown 57201 | (605) 882-6274 |
| Codington County Extension 1910 W Kemp, Watertown 57201 | (605) 882-6300 |
| Codington County Hwy Shop 1201 10th St Nw, Watertown 57201 | (605) 882-6270 |
| Codington County Hwy Supt 1201 10th St Nw, Watertown 57201 | (605) 882-6271 |
| Codington County Nursing Stdnt 119 S Maple, Watertown 57201 | (605) 882-5067 |
| Codington County Veteran Svc 16 1st Ave Se, Watertown 57201 | (605) 882-6289 |