| Business | Phone |
| Illini Central Grade School 208 N West St, Mason City 62664 | (217) 482-3269 |
| Illini Central High School 208 N West St, Mason City 62664 | (217) 482-3252 |
| Illini Central School Dist 189 208 N West St, Mason City 62664 | (217) 482-5180 |
| Illini Central Special Ed 160 E Chestnut St, Mason City 62664 | (217) 482-5755 |