List of Schools In Maryland
| School Name | City | Grades |
|---|---|---|
| OAK HILL ELEMENTARY SCHOOL 34 TRUCKHOUSE RD | SEVERNA PARK | PK-5 |
| OAK VIEW ELEMENTARY SCHOOL 400 EAST WAYNE AVE | SILVER SPRING | 3-5 |
| OAKCREST ELEMENTARY SCHOOL 929 HILL RD | LANDOVER | PK-6 |
| OAKDALE ELEMENTARY SCHOOL 9850 OLD NATIONAL PK | IJAMSVILLE | PK-5 |
| OAKDALE MIDDLE SCHOOL 9840 OLD NATIONAL PK | IJAMSVILLE | 6-8 |
| OAKLAND MILLS HIGH SCHOOL 9410 KILIMANJARO RD | COLUMBIA | 9-12 |
| OAKLAND MILLS MIDDLE SCHOOL 9540 KILIMANJARO RD | COLUMBIA | 6-8 |
| OAKLAND TERRACE ELEMENTARY SCHOOL 2720 PLYERS MILL RD | SILVER SPRING | KG-5 |
| OAKLANDS ELEMENTARY SCHOOL 13710 LAUREL BOWIE RD | LAUREL | PK-6 |
| OAKLEIGH ELEMENTARY SCHOOL 1900 WHITE OAK AVE | BALTIMORE | PK-5 |
| OAKVILLE ELEMENTARY SCHOOL 26410 THREE NOTCH RD | MECHANICSVILLE | PK-5 |
| OAKWOOD ELEMENTARY SCHOOL 330 OAK MANOR DR | GLEN BURNIE | PK-5 |
| OCEAN CITY ELEMENTARY SCHOOL 12828 CENTER DR | OCEAN CITY | PK-4 |
| ODENTON ELEMENTARY SCHOOL 1290 ODENTON RD | ODENTON | KG-5 |
| OKLAHOMA ROAD MIDDLE SCHOOL 6300 OKLAHOMA RD | SYKESVILLE | 6-8 |
| OLD COURT MIDDLE SCHOOL 4627 OLD COURT RD | BALTIMORE | 6-8 |
| OLD FORGE ELEMENTARY SCHOOL 21615 OLD FORGE RD | HAGERSTOWN | KG-5 |
| OLD MILL HIGH SCHOOL 600 PATRIOT LN | MILLERSVILLE | 9-12 |
| OLD MILL MIDDLE NORTH SCHOOL 610 PATRIOT LN | MILLERSVILLE | 6-8 |
| OLD MILL MIDDLE SCHOOL SOUTH 620 PATRIOT LN | MILLERSVILLE | 6-8 |
| OLIVER BEACH ELEMENTARY SCHOOL 12912 CUNNINGHILL COVE RD | BALTIMORE | PK-5 |
| OLNEY ELEMENTARY SCHOOL 3401 QUEEN MARY DR | OLNEY | KG-5 |
| ORCHARD GROVE ELEMENTARY SCHOOL 5898 HANNOVER DR | FREDERICK | PK-5 |
| OREMS ELEMENTARY SCHOOL 711 HIGH VILLA RD | BALTIMORE | PK-5 |
| OVERLEA HIGH & ACADEMY OF FINANCE 5401 KENWOOD AVE | BALTIMORE | 9-12 |
| OVERLOOK ELEMENTARY SCHOOL 401 HAMPTON RD | LINTHICUM | KG-5 |
| OVERLOOK ELEMENTARY SCHOOL 3298 CURTIS DR | TEMPLE HILLS | PK-5 |
| OWENS ROAD ELEMENTARY SCHOOL 1616 OWENS RD | OXON HILL | PK-6 |
| OWINGS MILLS ELEMENTARY SCHOOL 10824 REISTERTOWN RD | OWINGS MILLS | PK-5 |
| OWINGS MILLS HIGH SCHOOL 124 TOLLGATE RD | OWINGS MILLS | 9-12 |
| OXON HILL ELEMENTARY SCHOOL 7701 LIVINGSTON RD | OXON HILL | PK-6 |
| OXON HILL HIGH SCHOOL 6701 LEYTE DR | OXON HILL | 9-12 |
| OXON HILL MIDDLE SCHOOL 9570 FORT FOOTE RD | FORT WASHINGTON | 7-8 |