Best high schools in Cobb County (2025)
Schools classified as high schools by NCES. Ranked by the Success Index (US) from official American data; 16 schools in Cobb County, Georgia. Rank positions shown on each profile are within United States and Georgia.
- 185Walton High SchoolMarietta · Charter High89% Math proficiency · 2,705 students
- 283Pope High SchoolMarietta · Public High80% Math proficiency · 1,793 students
- 383Lassiter High SchoolMarietta · Public High85% Math proficiency · 2,005 students
- 479Harrison High SchoolKennesaw · Public High77% Math proficiency · 2,224 students
- 571Hillgrove High SchoolPowder Springs · Public High72% Math proficiency · 2,282 students
- 671Allatoona High SchoolAcworth · Public High66% Math proficiency · 1,560 students
- 764Kennesaw Mountain High SchoolKennesaw · Public High58% Math proficiency · 1,695 students
- 857Kell High SchoolMarietta · Public High45% Math proficiency · 1,587 students
- 955Wheeler High SchoolMarietta · Public High53% Math proficiency · 2,401 students
- 1052North Cobb High SchoolKennesaw · Public High49% Math proficiency · 2,463 students
- 1151Sprayberry High SchoolMarietta · Public High44% Math proficiency · 1,769 students
- 1244Campbell High SchoolSmyrna · Public High37% Math proficiency · 3,085 students
- 1339McEachern High SchoolPowder Springs · Public High39% Math proficiency · 2,175 students
- 1435South Cobb High SchoolAustell · Public High38% Math proficiency · 2,081 students
- 1524Pebblebrook High SchoolMableton · Public High30% Math proficiency · 2,574 students
- 1617Osborne High SchoolMarietta · Public High17% Math proficiency · 2,790 students
| # | School | Sector | Success Index (US) | Key result | Students |
|---|---|---|---|---|---|
| 1 | Walton High School Marietta · High · Grades 9–12 | Charter | 84.6 Top 5% | 89% Math proficiency | 2,705 |
| 2 | Pope High School Marietta · High · Grades 9–12 | Public | 83.2 Top 5% | 80% Math proficiency | 1,793 |
| 3 | Lassiter High School Marietta · High · Grades 9–12 | Public | 82.9 Top 10% | 85% Math proficiency | 2,005 |
| 4 | Harrison High School Kennesaw · High · Grades 9–12 | Public | 79.4 Top 10% | 77% Math proficiency | 2,224 |
| 5 | Hillgrove High School Powder Springs · High · Grades 9–12 | Public | 71.3 Top 25% | 72% Math proficiency | 2,282 |
| 6 | Allatoona High School Acworth · High · Grades 9–12 | Public | 71.0 Top 25% | 66% Math proficiency | 1,560 |
| 7 | Kennesaw Mountain High School Kennesaw · High · Grades 9–12 | Public | 64.1 Top 50% | 58% Math proficiency | 1,695 |
| 8 | Kell High School Marietta · High · Grades 9–12 | Public | 56.9 Top 50% | 45% Math proficiency | 1,587 |
| 9 | Wheeler High School Marietta · High · Grades 9–12 | Public | 54.5 Top 50% | 53% Math proficiency | 2,401 |
| 10 | North Cobb High School Kennesaw · High · Grades 9–12 | Public | 51.7 Top 50% | 49% Math proficiency | 2,463 |
| 11 | Sprayberry High School Marietta · High · Grades 9–12 | Public | 51.3 Top 50% | 44% Math proficiency | 1,769 |
| 12 | Campbell High School Smyrna · High · Grades 9–12 | Public | 44.0 Lower 50% | 37% Math proficiency | 3,085 |
| 13 | McEachern High School Powder Springs · High · Grades 9–12 | Public | 38.6 Lower 50% | 39% Math proficiency | 2,175 |
| 14 | South Cobb High School Austell · High · Grades 9–12 | Public | 35.3 Lower 50% | 38% Math proficiency | 2,081 |
| 15 | Pebblebrook High School Mableton · High · Grades 9–12 | Public | 24.1 Lower 50% | 30% Math proficiency | 2,574 |
| 16 | Osborne High School Marietta · High · Grades 9–12 | Public | 16.6 Lower 50% | 17% Math proficiency | 2,790 |
Walton High School in Marietta leads the 2025 list of high schools in Cobb County with a Success Index (US) of 84.6. Of the 16 schools shown, 15 are public, 1 are charter.
For the full picture see the wider Georgia high schools rankings, every school on the Cobb County page, or the comparison tool to put a shortlist side by side.
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Frequently asked questions
What is the best high school in Cobb County?
Walton High School in Marietta, Georgia ranks first among high schools in Cobb County with a Success Index (US) of 84.6 out of 100 (Enrollment: 2,705).
How are high schools in Cobb County ranked?
Each school's Success Index (US) combines 4 factors: math proficiency (30%), reading proficiency (30%), community advantage (fewer free/reduced-price lunch) (25%), students per teacher (15%). Each factor is a percentile against schools of the same type across United States. Schools with fewer than 60 students are excluded from rankings.
Are these 2025 rankings official?
No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.