| Business | Phone |
| Community Center 730 W Main St, Sullivan 63080 | (573) 468-9984 |
| Sullivan City Collector 210 W Washington St, Sullivan 63080 | (573) 468-4012 |
| Sullivan Electric Dept 305 N Park St, Sullivan 63080 | (573) 468-4712 |
| Sullivan Engineering Dept 210 W Washington St, Sullivan 63080 | (573) 468-8965 |
| Sullivan Sewer Dept 248 E Springfield Rd, Sullivan 63080 | (573) 468-4812 |