| Business | Phone |
| Weed & Pest Supervisor 706 N Cloud St, Clark 57225 | (605) 532-3538 |
| Clark County Circuit Ct Clerks 200 N Commercial St, Clark 57225 | (605) 532-5851 |
| Clark County Equalization 200 N Commercial St, Clark 57225 | (605) 532-3751 |
| Clark County Extension Agent 210 N Commercial St, Clark 57225 | (605) 532-3681 |
| Clark County Farmers Home Adm 400 1st Ave E, Clark 57225 | (605) 532-5861 |
| Clark County Highway Supt 200 N Commercial St, Clark 57225 | (605) 532-3667 |
| Clark County Nurse 200 N Commercial St, Clark 57225 | (605) 532-3168 |
| Clark County Register Of Deeds 202 N Commercial St, Clark 57225 | (605) 532-5363 |
| Clark County Svc Agency 400 1st Ave E, Clark 57225 | (605) 532-3686 |
| Clark County Veterans Svc Ofcr 102 1st Ave W, Clark 57225 | (605) 532-5435 |
| County Highway Shop 736 N Cloud St, Clark 57225 | (605) 532-3616 |
| County Janitor 200 N Commercial St, Clark 57225 | (605) 532-3972 |