| Business | Phone |
| Us Consolidated Farm Svc Agcy Highway 16, Sidney 59270 | (406) 433-2103 |
| Richland Cnty Driver Examiner 201 W Main St, Sidney 59270 | (406) 433-2378 |
| Richland County Assessment Ofc 201 W Main St, Sidney 59270 | (406) 433-1203 |
| Richland County Coalition 913 6th St Sw, Sidney 59270 | (406) 433-7421 |
| Richland County Commissioners 201 W Main St, Sidney 59270 | (406) 433-1706 |
| Richland County Dist Ct Clerk 201 W Main St, Sidney 59270 | (406) 433-1709 |
| Richland County Extension Ofc 123 W Main St, Sidney 59270 | (406) 433-1206 |
| Richland County Fair & Rodeo Highway 16 N, Sidney 59270 | (406) 433-2801 |
| Richland County Land Fill 2140 W Holly St, Sidney 59270 | (406) 798-3352 |
| Richland County Planning Courthouse, Sidney 59270 | (406) 433-6886 |
| Richland County Public Assist 221 5th St Sw, Sidney 59270 | (406) 433-2282 |
| Richland County Recorder 201 W Main St, Sidney 59270 | (406) 433-1708 |
| Richland County Repair Shop 2140 W Holly St, Sidney 59270 | (406) 433-2106 |
| Richland County Weed District 2750 W Holly St, Sidney 59270 | (406) 433-9047 |
| Richland County Worc Office 221 5th St Sw, Sidney 59270 | (406) 433-3505 |