| Business | Phone |
| A D Stowell Elementary 700 Fulton Ave, Hannibal 63401 | (573) 221-0980 |
| Early Headstart 661 Clinic Rd, Hannibal 63401 | (573) 221-1540 |
| Eugene Field Elementary School 1405 Pearl St, Hannibal 63401 | (573) 221-1050 |
| Hannibal Athletic Dept 4500 Mcmasters Ave, Hannibal 63401 | (573) 221-3180 |
| Hannibal Board Of Education 4650 Mcmasters Ave, Hannibal 63401 | (573) 221-1258 |
| Hannibal Early Child 4600 Mcmasters Ave, Hannibal 63401 | (573) 221-3054 |
| Hannibal Financial Aid 4550 Mcmasters Ave, Hannibal 63401 | (573) 221-4493 |
| Hannibal Head Start 2181 Johnson St, Hannibal 63401 | (573) 231-0754 |
| Hannibal Middle School 4700 Mcmasters Ave, Hannibal 63401 | (573) 221-5840 |
| Hannibal Public Schools-Food 4600 Mcmasters Ave, Hannibal 63401 | (573) 221-2378 |
| Hannibal Senior High School 4500 Mcmasters Ave, Hannibal 63401 | (573) 221-2733 |
| Hannibal Technology Svc 4500 Mcmasters Ave, Hannibal 63401 | (573) 221-7949 |
| Hannibal Transportation Ctr 2365 Warren Barrett Dr, Hannibal 63401 | (573) 221-2604 |
| Heartland Educational Ministrs 8085 Highway Mm, Hannibal 63401 | (573) 248-0025 |
| Heartland Educational Mnstrs 838 Grand Ave # B, Hannibal 63401 | (573) 248-1796 |
| Holy Family School 1113 Broadway, Hannibal 63401 | (573) 221-0456 |
| Mark Twain Elementary 2714 Bird St, Hannibal 63401 | (573) 221-0768 |
| Mississippi Valley State Schl 312 Munger Ln, Hannibal 63401 | (573) 221-1857 |
| Oakwood Elementary School 3716 Market St, Hannibal 63401 | (573) 221-2747 |
| St John's Lutheran School 1317 Lyon St, Hannibal 63401 | (573) 221-0215 |
| Veterans Elementary School 790 N Veterans Rd, Hannibal 63401 | (573) 221-0649 |