List of Schools In Colorado
| School Name | City | Grades |
|---|---|---|
| O'CONNELL MIDDLE SCHOOL 1275 SOUTH TELLER ST | LAKEWOOD | 7-8 |
| O'DEA ELEMENTARY SCHOOL 312 PRINCETON RD | FORT COLLINS | PK-5 |
| OAK CREEK ELEMENTARY SCHOOL 3333 OAK CREEK DR WEST | COLORADO SPRINGS | PK-5 |
| OAK GROVE ELEMENTARY SCHOOL 62100 OAK GROVE RD | MONTROSE | KG-5 |
| OAKLAND ELEMENTARY SCHOOL 4580 DEARBORN ST | DENVER | PK-5 |
| OBERON JUNIOR HIGH SCHOOL 7300 QUAIL ST | ARVADA | 7-8 |
| ODYSSEY CHARTER ELEMENTARY SCHOOL 8750 EAST 28TH AVE | DENVER | KG-8 |
| ODYSSEY ELEMENTARY SCHOOL 6275 BRIDLESPUR AVE | COLORADO SPRINGS | PK-5 |
| OLANDER ELEMENTARY SCHOOL 3401 AUNTIE STONE ST | FORT COLLINS | PK-5 |
| OLATHE ELEMENTARY SCHOOL 211 NORTH ROBERTS | OLATHE | KG-5 |
| OLATHE HIGH SCHOOL 410 HWY 50 | OLATHE | 9-12 |
| OLATHE MIDDLE SCHOOL 326 HWY 50 | OLATHE | 6-8 |
| OLDE COLUMBINE HIGH SCHOOL 1200 SOUTH SUNSET | LONGMONT | 9-12 |
| OLGA A HELLBECK ELEMENTARY SCHOOL 3000 LAKEVIEW | PUEBLO | PK-5 |
| OMAR D BLAIR CHARTER SCHOOL 4905 CATHAY ST | DENVER | KG-8 |
| ONLINE HIGH SCHOOL 900 GRANT ST | DENVER | 9-12 |
| OPTIONS SCHOOL 11351 EAST MONTVIEW BLVD | AURORA | KG-12 |
| ORCHARD AVENUE ELEMENTARY SCHOOL 1800 ORCHARD AVE | GRAND JUNCTION | PK-5 |
| ORCHARD MESA MIDDLE SCHOOL 2736 C RD | GRAND JUNCTION | 6-8 |
| ORTEGA MIDDLE SCHOOL 401 VICTORIA AVE | ALAMOSA | 6-8 |
| OTERO ELEMENTARY SCHOOL 1650 CHARMWOOD DR | COLORADO SPRINGS | PK-6 |
| OTHO E STUART MIDDLE SCHOOL 15955 EAST 101ST WAY | COMMERCE CITY | 6-8 |
| OTIS ELEMENTARY SCHOOL 518 DUNGAN ST | OTIS | PK-6 |
| OTIS JUNIOR-HIGH SCHOOL 301 WORK ST | OTIS | 7-12 |
| OURAY ELEMENTARY SCHOOL 400 7TH AVE | OURAY | PK-6 |
| OURAY HIGH SCHOOL 400 7TH AVE | OURAY | 9-12 |
| OURAY MIDDLE SCHOOL 400 7TH AVE | OURAY | 7-8 |
| OVERLAND HIGH SCHOOL 12400 EAST JEWELL AVE | AURORA | 9-12 |
| OVERLAND TRAIL MIDDLE SCHOOL 455 NORTH 19TH AVE | BRIGHTON | 6-8 |