Cobb County schools ranked by test score
Latest Georgia Milestones year (2024-25). 116 schools in Cobb County, Georgia with reported Science scores. Georgia state average: 40.7%.
| Rank | School | Level | Science | vs state |
|---|---|---|---|---|
| 101 | Green Acres Elementary School Smyrna · Cobb County | Elementary | 19.5% | -21.2pp |
| 102 | Hollydale Elementary School Marietta · Cobb County | Elementary | 19.0% | -21.7pp |
| 103 | Palmer Middle School Kennesaw · Cobb County | Middle | 18.8% | -21.9pp |
| 104 | Smitha Middle School Marietta · Cobb County | Middle | 18.8% | -21.9pp |
| 105 | Mableton Elementary School Mableton · Cobb County | Elementary | 18.2% | -22.5pp |
| 106 | Awtrey Middle School Kennesaw · Cobb County | Middle | 17.4% | -23.3pp |
| 107 | Powder Springs Elementary School Powder Springs · Cobb County | Elementary | 17.4% | -23.3pp |
| 108 | South Cobb High School Austell · Cobb County | High | 17.2% | -23.5pp |
| 109 | Garrett Middle School Austell · Cobb County | Middle | 17.1% | -23.6pp |
| 110 | Norton Park Elementary School Smyrna · Cobb County | Elementary | 15.9% | -24.8pp |
| 111 | Cobb Horizon High School Atlanta · Cobb County | High | 14.1% | -26.5pp |
| 112 | Tapp Middle School Powder Springs · Cobb County | Middle | 13.9% | -26.8pp |
| 113 | Compton Elementary School Powder Springs · Cobb County | Elementary | 13.8% | -26.9pp |
| 114 | Lockheed Elementary School Marietta · Marietta City | Elementary | 13.4% | -27.3pp |
| 115 | Campbell Middle School Smyrna · Cobb County | Middle | 12.0% | -28.7pp |
| 116 | Pearson Middle School Marietta · Cobb County | Middle | 11.3% | -29.4pp |
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 Science 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.