| Business | Phone |
| Alameda Elementary School 1252 Alameda Dr, Ontario 97914 | (541) 889-5497 |
| Annex School 402 Annex Rd, Ontario 97914 | (541) 262-3280 |
| Cairo Elementary School 531 Highway 20/26, Ontario 97914 | (541) 889-5745 |
| George K Aiken School 1297 W Idaho Ave, Ontario 97914 | (541) 889-5584 |
| May Roberts School 590 Nw 8th St, Ontario 97914 | (541) 889-5379 |
| Ontario High School 1115 W Idaho Ave, Ontario 97914 | (541) 889-5309 |
| Ontario Middle School 573 Sw 2nd Ave, Ontario 97914 | (541) 889-5377 |
| Ontario Public Schools 617 Nw 6th St, Ontario 97914 | (541) 889-6199 |
| Ontario School District 8c 195 Sw 3rd Ave, Ontario 97914 | (541) 889-5374 |
| Ontario School District Mntnc 689 Nw 6th St, Ontario 97914 | (541) 881-1274 |
| Pioneer Elementary School 4744 Pioneer Rd, Ontario 97914 | (541) 262-3902 |
| St Peter Catholic School 98 Sw 9th St, Ontario 97914 | (541) 889-7363 |
| Treasure Valley Christian Schl 386 N Verde Dr, Ontario 97914 | (541) 889-4662 |