| Business | Phone |
| Oswego City Community Hall 703 5th St, Oswego 67356 | (620) 795-2413 |
| Oswego City Office 703 5th St, Oswego 67356 | (620) 795-4433 |
| Oswego Water Plant 210 Adams St, Oswego 67356 | (620) 795-4823 |
| Oswego Water Plant River Rd, Oswego 67356 | (620) 795-4823 |