List of Schools In Missouri
| School Name | City | Grades |
|---|---|---|
| O'NEAL ELEMENTARY SCHOOL 2300 BAUGH LN | POPLAR BLUFF | 1-4 |
| OAK BROOK ELEMENTARY SCHOOL 510 BIG BEND RD | BALLWIN | KG-5 |
| OAK GROVE ELEMENTARY SCHOOL 3297 OAK GROVE RD | POPLAR BLUFF | 1-4 |
| OAK GROVE ELEMENTARY SCHOOL 501 SE 12TH ST | OAK GROVE | 3-5 |
| OAK GROVE HIGH SCHOOL 605 SE 12TH | OAK GROVE | 9-12 |
| OAK GROVE MIDDLE SCHOOL 401 SE 12TH ST | OAK GROVE | 6-8 |
| OAK GROVE PRIMARY SCHOOL 500 SE 17TH | OAK GROVE | PK-2 |
| OAK HILL ELEMENTARY SCHOOL 4300 MORGANFORD RD | ST. LOUIS | PK-5 |
| OAK HILL ELEMENTARY SCHOOL 6200 SOUTH HWY 19 | SALEM | KG-8 |
| OAK PARK HIGH SCHOOL 825 NE 79TH TERR | KANSAS CITY | 9-12 |
| OAK RIDGE ELEMENTARY SCHOOL 4198 STATE HWY EAST | OAK RIDGE | PK-6 |
| OAK RIDGE ELEMENTARY SCHOOL TOWNSHIP RD | CAMDENTON | 5-6 |
| OAK RIDGE HIGH SCHOOL 4198 STATE HWY EAST | OAK RIDGE | 7-12 |
| OAK VIEW LEARNING CENTER SCHOOL 1317 WEST STATE HWY 84 | HAYTI | PK-12 |
| OAKLAND JR. HIGH SCHOOL 3405 OAKLAND PLACE | COLUMBIA | 8-9 |
| OAKVIEW STATE SCHOOL 200 LINDEN ST | MONETT | KG-12 |
| OAKVILLE ELEMENTARY SCHOOL 2911 YAEGER RD | ST. LOUIS | KG-5 |
| OAKVILLE MIDDLE SCHOOL 5950 TELEGRAPH RD | ST. LOUIS | 6-8 |
| OAKVILLE SR. HIGH SCHOOL 5557 MILBURN RD | ST. LOUIS | 9-12 |
| OAKWOOD ELEMENTARY SCHOOL 3716 MARKET ST | HANNIBAL | PK-5 |
| OAKWOOD MANOR ELEMENTARY SCHOOL 5900 NORTH FLORA | KANSAS CITY | KG-5 |
| ODESSA HIGH SCHOOL 713 SOUTH THIRD ST | ODESSA | 9-12 |
| ODESSA MIDDLE SCHOOL 607 SOUTH FIFTH ST | ODESSA | 6-8 |
| ODESSA UPPER ELEMENTARY SCHOOL 1100 WEST COX SCHOOL RD | ODESSA | 3-5 |
| OLD BONHOMME ELEMENTARY SCHOOL 9661 OLD BONHOMME | ST. LOUIS | KG-5 |
| OLD NORTH SCHOOL 3017 NORTH 13TH ST | ST. LOUIS | KG-8 |
| ORAN ELEMENTARY SCHOOL 310 CHURCH ST | ORAN | KG-6 |
| ORAN HIGH SCHOOL 310 CHURCH ST | ORAN | 7-12 |
| ORCHARD DRIVE ELEMENTARY SCHOOL 1402 ORCHARD DR | JACKSON | KG-3 |
| ORCHARD FARM ELEMENTARY SCHOOL 2165 HWY V | ST. CHARLES | PK-5 |
| ORCHARD FARM MIDDLE SCHOOL 2165 HWY V | ST. CHARLES | 6-8 |
| ORCHARD FARM SR. HIGH SCHOOL 2165 HWY V | ST. CHARLES | 9-12 |
| OREARVILLE ELEMENTARY SCHOOL 32524 EAST HWY P | SLATER | KG-8 |
| ORRICK ELEMENTARY SCHOOL 100 KIRKHAM | ORRICK | PK-6 |
| ORRICK HIGH SCHOOL 100 KIRKHAM | ORRICK | 7-12 |
| OSAGE BEACH ELEMENTARY SCHOOL 4427 HWY 54 | OSAGE BEACH | PK-4 |
| OSAGE COUNTY ELEMENTARY SCHOOL 1212 EAST MAIN ST | LINN | PK-6 |
| OSAGE COUNTY ELEMENTARY SCHOOL 614 SOUTH POPLAR ST | CHAMOIS | PK-6 |
| OSAGE HIGH SCHOOL 636 HWY 42 | OSAGE BEACH | 9-12 |
| OSAGE JR. HIGH SCHOOL 635 HWY 42 | OSAGE BEACH | 6-8 |
| OSAGE TRAIL MIDDLE SCHOOL 2101 NORTH TWYMAN RD | INDEPENDENCE | 7-8 |
| OSAGE UPPER ELEMENTARY SCHOOL 626 HWY 42 | OSAGE BEACH | 3-5 |
| OSBORN ELEMENTARY SCHOOL 275 CLINTON AVE | OSBORN | KG-6 |
| OSBORN HIGH SCHOOL 275 CLINTON AVE | OSBORN | 7-12 |
| OSCEOLA ELEMENTARY SCHOOL 76 SE HWY WW | OSCEOLA | PK-6 |
| OSCEOLA JR.-SR. HIGH SCHOOL 76 SE HWY WW | OSCEOLA | 7-12 |
| OSTMANN ELEMENTARY SCHOOL 200 MERIWETHER LEWIS DR | O'FALLON | KG-5 |
| OTT ELEMENTARY SCHOOL 1525 NORTH NOLAND RD | INDEPENDENCE | PK-5 |
| OTTERVILLE ELEMENTARY SCHOOL 100 SPRING ST | OTTERVILLE | KG-6 |
| OTTERVILLE HIGH SCHOOL 100 SPRING ST | OTTERVILLE | 7-12 |
| OWENSVILLE ELEMENTARY SCHOOL 2000 DUTCHMAN DR | OWENSVILLE | KG-5 |
| OWENSVILLE HIGH SCHOOL 3336 HWY 19 | OWENSVILLE | 9-12 |
| OWENSVILLE MIDDLE SCHOOL 3340 HWY 19 | OWENSVILLE | 6-8 |
| OZANAM-INDEPENDENCE SCHOOL 600 WEST MECHANIC AVE | INDEPENDENCE | KG-12 |
| OZARK CORRECTIONAL CENTER SCHOOL 929 HONOR CAMP LN | FORDLAND | N |
| OZARK HIGH SCHOOL 1350 WEST BLUFF DR | OZARK | 9-12 |
| OZARK HILLS STATE SCHOOL 100 SOUTH WARFEL ST | SALEM | KG-12 |
| OZARK HORIZON STATE SCHOOL 1715 WAYHAVEN DR | WEST PLAINS | KG-12 |
| OZARK JR. HIGH SCHOOL 1109 WEST JACKSON | OZARK | 7-8 |
| OZARK MOUNTAIN TECHNICAL CENTER SCHOOL 211 EAST FIFTH ST | MOUNTAIN GROVE | 9-12 |
| OZARK REGIONAL JUVENILE DETENTION CENTER SCHOOL 1400 INDUSTRIAL PARK | MOUNTAIN GROVE | 5-12 |