| Business | Phone |
| Ada City Purchasing 512 N Stockton St, Ada 74820 | (580) 436-8042 |
| Ada City Sewer Plant 1801 N Mississippi Rd, Ada 74820 | (580) 436-6300 |
| Ada Code Enforcement 201 W 12th St, Ada 74820 | (580) 436-8136 |
| Ada Inspection Dept 201 W 12th St, Ada 74820 | (580) 436-8137 |
| Ada Landfill Ada 74820 | (580) 436-1403 |
| Rosedale Cemetery Chapel 231 S Townsend St, Ada 74820 | (580) 436-6300 |