| Business | Phone |
| Westminster Christian Academy 1145 College Ave, Alton 62002 | (618) 465-1918 |
| Alton Community School Dist 1400 State St, Alton 62002 | (618) 462-9338 |
| Alton Community School Dist 2708 Edwards St, Alton 62002 | (618) 462-1007 |
| Alton Community Unit School 1854 E Broadway, Alton 62002 | (618) 474-2600 |
| Alton High School 2200 College Ave, Alton 62002 | (618) 474-2700 |
| Alton Success Academy 4200 Humbert Rd, Alton 62002 | (618) 463-2002 |
| West Elementary School 1513 State St, Alton 62002 | (618) 463-2134 |
| Special Education Offices 1854 E Broadway R, Alton 62002 | (618) 463-2137 |
| St Mary's School 536 E 3rd St, Alton 62002 | (618) 465-8523 |
| St Matthews's School 1015 Milton Rd, Alton 62002 | (618) 462-6032 |
| St Peter & Paul School 801 State St, Alton 62002 | (618) 465-8711 |
| East Middle School 1035 Washington Ave, Alton 62002 | (618) 463-2130 |
| Educational Therapy Ctr 1020 State St, Alton 62002 | (618) 465-4451 |
| Eunice Smith School 2400 Henry St, Alton 62002 | (618) 463-2077 |
| North Middle School 2200 College Ave, Alton 62002 | (618) 463-2171 |
| Motivation Achievement Ctr 2512 Amelia St, Alton 62002 | (618) 463-2063 |
| Horace Mann Elementary School 2708 Edwards St, Alton 62002 | (618) 463-2070 |
| Humboldt School 1028 E 6th St, Alton 62002 | (618) 463-2411 |
| J B Johnson Career Develop Ctr 4200 Humbert Rd, Alton 62002 | (618) 463-2153 |
| J B Johnson Elementary School 1043 Tremont St, Alton 62002 | (618) 463-2157 |
| Mark Twain Elementary School 907 Milton Rd, Alton 62002 | (618) 463-2083 |
| Marquette Catholic High School 219 E 4th St, Alton 62002 | (618) 463-0580 |
| Lewis & Clark Community Clg 1800 E Broadway, Alton 62002 | (618) 468-2377 |
| Lovejoy Elementary School 1043 Tremont St, Alton 62002 | (618) 463-2057 |