Cobb County schools ranked by test score
Latest Georgia Milestones year (2024-25). 18 schools in Cobb County, Georgia with reported Mathematics scores. Georgia state average: 44.6%.
| Rank | School | Level | Mathematics | vs state |
|---|---|---|---|---|
| 1 | Lassiter High School Marietta · Cobb County | High | 72.1% | +27.5pp |
| 2 | Harrison High School Kennesaw · Cobb County | High | 71.0% | +26.4pp |
| 3 | Walton High School Marietta · Cobb County | High | 70.7% | +26.1pp |
| 4 | Hillgrove High School Powder Springs · Cobb County | High | 66.6% | +22.0pp |
| 5 | Kennesaw Mountain High School Kennesaw · Cobb County | High | 65.6% | +21.0pp |
| 6 | Pope High School Marietta · Cobb County | High | 64.5% | +19.9pp |
| 7 | Kell High School Marietta · Cobb County | High | 59.6% | +15.0pp |
| 8 | Allatoona High School Acworth · Cobb County | High | 58.9% | +14.3pp |
| 9 | North Cobb High School Kennesaw · Cobb County | High | 51.0% | +6.4pp |
| 10 | Wheeler High School Marietta · Cobb County | High | 49.9% | +5.3pp |
| 11 | Marietta High School Marietta · Marietta City | High | 47.7% | +3.1pp |
| 12 | Sprayberry High School Marietta · Cobb County | High | 43.6% | -1.0pp |
| 13 | Campbell High School Smyrna · Cobb County | High | 38.6% | -6.0pp |
| 14 | Pebblebrook High School Mableton · Cobb County | High | 34.7% | -9.9pp |
| 15 | South Cobb High School Austell · Cobb County | High | 32.0% | -12.6pp |
| 16 | Cobb Horizon High School Atlanta · Cobb County | High | 29.3% | -15.3pp |
| 17 | McEachern High School Powder Springs · Cobb County | High | 27.8% | -16.8pp |
| 18 | Osborne High School Marietta · Cobb County | High | 21.4% | -23.2pp |
About this ranking
Schools are ranked by the percentage of students who scored at or above the Georgia Milestones % Proficient or Distinguished threshold on the latest available Georgia Milestones Mathematics test (school year 2024-25). Only public schools in Cobb County, Georgia with a reasonable cohort size are shown. A higher percentage is better.
The comparison column shows the gap to the Georgia statewide enrollment-weighted average. To compare against neighboring counties, use the full Georgia ranking.