| School Name | Grades | Address | Zip | Phone | County | Type | District Name |
| Crab Orchard Elementary School | PK-8 | 19189 Bailey St Marion, IL | 62959 | (618) 982-2181 | Williamson | public | Crab Orchard Cusd 3 |
| Crab Orchard High School | 9-12 | 19189 Bailey St Marion, IL | 62959 | (618) 982-2181 | Williamson | public | Crab Orchard Cusd 3 |
| Jefferson Elementary School | K-5 | 700 E Boulevard St Marion, IL | 62959 | (618) 997-5766 | Williamson | public | Marion Cusd 2 |
| Lincoln Elementary School | PK-5 | 400 Morningside Dr Marion, IL | 62959 | (618) 997-6063 | Williamson | public | Marion Cusd 2 |
| Longfellow Elementary School | PK-5 | 1400 W Hendrickson St Marion, IL | 62959 | (618) 993-3230 | Williamson | public | Marion Cusd 2 |
| Marion Adventist School | 1, 4, 6-7 | 9314 Old Route 13 Marion, IL | 62959 | (618) 997-1430 | Williamson | private | |
| Marion High School | 9-12 | 1501 S Carbon St Marion, IL | 62959 | (618) 993-8196 | Williamson | public | Marion Cusd 2 |
| Marion Junior High School | 6-8 | 1609 W Main St Marion, IL | 62959 | (618) 997-1317 | Williamson | public | Marion Cusd 2 |
| School for Hearing Impaired | PK-8 | 801 E Reeves St Marion, IL | 62959 | (618) 997-2472 | Williamson | public | Williamson County Special Educ District |
| Skyline Academy | K-3 | 709 Skyline Dr Marion, IL | 62959 | (618) 993-1499 | Williamson | private | |
| Washington Elementary School | PK-5 | 420 E Main St Marion, IL | 62959 | (618) 993-8534 | Williamson | public | Marion Cusd 2 |
| Williamson County Learning Center | 6-12 | 409 S Court St Marion, IL | 62959 | (618) 997-1933 | Williamson | public | Williamson County Special Educ District |