Cobb County schools ranked by test score
Latest Georgia Milestones year (2024-25). 118 schools in Cobb County, Georgia with reported Mathematics scores. Georgia state average: 44.6%.
| Rank | School | Level | Mathematics | vs state |
|---|---|---|---|---|
| 101 | Belmont Hills Elementary School Smyrna · Cobb County | Elementary | 30.5% | -14.0pp |
| 102 | Powers Ferry Elementary School Marietta · Cobb County | Elementary | 29.9% | -14.7pp |
| 103 | Hollydale Elementary School Marietta · Cobb County | Elementary | 29.9% | -14.7pp |
| 104 | Cobb Horizon High School Atlanta · Cobb County | High | 29.3% | -15.3pp |
| 105 | Compton Elementary School Powder Springs · Cobb County | Elementary | 29.1% | -15.5pp |
| 106 | Smitha Middle School Marietta · Cobb County | Middle | 28.7% | -15.9pp |
| 107 | Lindley Middle School Mableton · Cobb County | Middle | 28.6% | -15.9pp |
| 108 | LaBelle Elementary School Marietta · Cobb County | Elementary | 28.6% | -16.0pp |
| 109 | McEachern High School Powder Springs · Cobb County | High | 27.8% | -16.8pp |
| 110 | Russell Elementary School Smyrna · Cobb County | Elementary | 26.6% | -18.0pp |
| 111 | Lockheed Elementary School Marietta · Marietta City | Elementary | 26.1% | -18.5pp |
| 112 | Mableton Elementary School Mableton · Cobb County | Elementary | 25.6% | -19.0pp |
| 113 | City View Elementary School Mableton · Cobb County | Elementary | 24.9% | -19.7pp |
| 114 | Green Acres Elementary School Smyrna · Cobb County | Elementary | 23.4% | -21.2pp |
| 115 | Brumby Elementary School Marietta · Cobb County | Elementary | 21.6% | -22.9pp |
| 116 | Osborne High School Marietta · Cobb County | High | 21.4% | -23.2pp |
| 117 | Pearson Middle School Marietta · Cobb County | Middle | 17.6% | -27.0pp |
| 118 | Riverside Elementary School Mableton · Cobb County | Elementary | 16.2% | -28.4pp |
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.