| Business | Phone |
| O B Curtis Water Plant 100 Ob Curtis Dr, Ridgeland 39157 | (601) 957-7061 |
| O B Curtis Water Plant Lake Harbour Rd, Ridgeland 39157 | (601) 957-7061 |
| Ridgeland City Licenses Dept 304 Highway 51, Ridgeland 39157 | (601) 856-7113 |
| Ridgeland Finance & Adm 304 Highway 51, Ridgeland 39157 | (601) 856-7114 |
| Ridgeland Permits & Inspection 304 Highway 51, Ridgeland 39157 | (601) 856-3877 |
| Ridgeland Personnel Officer 304 Highway 51, Ridgeland 39157 | (601) 856-7115 |
| Ridgeland Privilege Licences 304 Highway 51, Ridgeland 39157 | (601) 853-2013 |
| Ridgeland Purchasing 304 Highway 51, Ridgeland 39157 | (601) 856-4061 |
| Ridgeland Water Maintenance 240 W School St, Ridgeland 39157 | (601) 856-4646 |