| Business | Phone |
| Clark Elementary School 200 2nd Ave Nw, Clark 57225 | (605) 532-3606 |
| Clark Junior-Senior High Schl 220 N Clinton St, Clark 57225 | (605) 532-3605 |
| Clark School District 12-2 220 N Clinton St, Clark 57225 | (605) 532-3603 |
| Harlowis School Bus Svc Inc 770 N Cloud St, Clark 57225 | (605) 532-3836 |