| Business | Phone |
| Cooper County Circuit Clerk 200 Main St # 26, Boonville 65233 | (660) 882-2232 |
| Cooper County Civil Div 200 Main St # 31, Boonville 65233 | (660) 882-5604 |
| Cooper County Collector 200 Main St # 27, Boonville 65233 | (660) 882-2584 |
| Cooper County Commissioners 200 Main St, Boonville 65233 | (660) 882-2228 |
| Cooper Juvenile Officer 200 Main St # 2, Boonville 65233 | (660) 882-7472 |