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Best High Schools in Cobb County, GA

New rankings! SchoolDigger recently updated its Georgia rankings with newly released test scores for the 2025-26 school year.

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Test scores delayed: 2026 rankings for Georgia do not yet include English Language Arts scores, which will not be released by the Georgia Department of Education until winter 2026.

At a glance

Schools

38,664

Students

Districts

5-star schools

Top rankedWalton High School8^th of 455 Georgia high schools

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Biggest riser

Pebblebrook High School up 56 spots statewide this year

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Smallest classes

Cobb Horizon High School 12.7 students per teacher

SchoolDigger ratings

5★

4★

3★

2 schools without a SchoolDigger rating (too few tested students)

See the top-ranked Georgia schools →

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				Milestones Assessment Algebra I (2026)	Milestones Assessment Biology (2026)	Milestones Assessment United States History (2026)	Milestones Assessment Mathematics (2026)	Milestones Assessment Science (2026)	Milestones Assessment Social Studies (2026)	Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	Milestones Assessment Algebra I End of Course	Milestones Assessment Biology End of Course	Milestones Assessment United States History End of Course	Milestones Assessment Mathematics 8th Grade	Milestones Assessment Science 8th Grade	Milestones Assessment Social Studies 8th Grade	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Marietta Regional Youth Detention Center	Public	5-12	1575 County Services Pkwy SW	Marietta	30008	Cobb County	Department of Juvenile Justice	No	No	No	Yes	(770) 528-4247	18	4	4.5	83.3%	3 (16.7%)	12 (66.7%)	3 (16.7%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)
Walton High School	Public, Charter	9-12	1590 Bill Murdock Rd	Marietta	30062	Cobb County	Cobb County	Yes	No	No	No	(770) 578-3225	2,705	142	19.1	7.6%	1,565 (57.9%)	169 (6.2%)	208 (7.7%)	652 (24.1%)	5 (0.2%)	1 (0.0%)	105 (3.9%)	91.8	8^th of 455 public high schools	98.2%		93.5	9^th of 451 public high schools	98.0%	1	81.8	86.3	76.4				$12,373	$345	$12,028
Osborne High School	Public	9-12	2451 Favor Rd SW	Marietta	30060	Cobb County	Cobb County	No	No	No	Yes	(770) 437-5900	2,790	178	15.7	100.0%	118 (4.2%)	717 (25.7%)	1,856 (66.5%)	36 (1.3%)	2 (0.1%)	2 (0.1%)	59 (2.1%)	32.4	273^rd of 455 public high schools	40.0%		26.7	317^th of 451 public high schools	29.7%	44	30.2	28.9	39.5				$14,616	$890	$13,727
North Cobb High School	Public	9-12	3400 Old 41 Hwy NW	Kennesaw	30144	Cobb County	Cobb County	No	No	No	No	(770) 975-6685	2,463	145	16.9	49.9%	669 (27.2%)	959 (38.9%)	563 (22.9%)	102 (4.1%)	7 (0.3%)	4 (0.2%)	159 (6.5%)	65.9	85^th of 455 public high schools	81.3%		65.9	100^th of 451 public high schools	77.8%	15	43.4	62.5	57.8				$13,733	$466	$13,267
Wheeler High School	Public	9-12	375 Holt Rd NE	Marietta	30068	Cobb County	Cobb County	No	No	No	No	(770) 578-3266	2,401	147	16.3	48.9%	556 (23.2%)	797 (33.2%)	626 (26.1%)	318 (13.2%)	2 (0.1%)	1 (0.0%)	101 (4.2%)	51.3	160^th of 455 public high schools	64.8%		66.2	97^th of 451 public high schools	78.5%	63	41.5	55.9	35.4				$13,905	$401	$13,505
McEachern High School	Public	9-12	2400 New Macland Rd	Powder Springs	30127	Cobb County	Cobb County	No	No	No	No	(770) 222-3710	2,175	126	17.2	69.3%	123 (5.7%)	1,433 (65.9%)	509 (23.4%)	12 (0.6%)	3 (0.1%)	0 (0.0%)	95 (4.4%)	44.9	192^nd of 455 public high schools	57.8%		42.3	211^th of 451 public high schools	53.2%	19	33.6	35.7	51.1				$13,650	$366	$13,284
Campbell High School	Public	9-12	925 Powder Springs St SE	Smyrna	30080	Cobb County	Cobb County	No	No	No	No	(678) 842-6850	3,085	176	17.4	52.1%	561 (18.2%)	1,315 (42.6%)	900 (29.2%)	149 (4.8%)	9 (0.3%)	2 (0.1%)	149 (4.8%)	51.9	156^th of 455 public high schools	65.7%		57.9	131^st of 451 public high schools	71.0%	25	37.2	51.0	46.1				$13,029	$340	$12,689
Sprayberry High School	Public	9-12	2525 Sandy Plains Rd	Marietta	30066	Cobb County	Cobb County	No	No	No	No	(770) 578-3200	1,769	105	16.8	48.6%	537 (30.4%)	521 (29.5%)	490 (27.7%)	111 (6.3%)	9 (0.5%)	3 (0.2%)	98 (5.5%)	56	133^rd of 455 public high schools	70.8%		68	90^th of 451 public high schools	80.0%	43	41.8	46.1	57.7				$13,848	$383	$13,465
Pebblebrook High School	Public	9-12	991 Old Alabama Rd SW	Mableton	30126	Cobb County	Cobb County	No	No	No	Yes	(770) 819-2521	2,574	151	17.1	96.5%	109 (4.2%)	1,229 (47.7%)	1,166 (45.3%)	2 (0.1%)	3 (0.1%)	1 (0.0%)	64 (2.5%)	45.9	185^th of 455 public high schools	59.3%		38.4	241^st of 451 public high schools	46.6%	56	25.3	45.3	48.9				$14,156	$867	$13,289
South Cobb High School	Public	9-12	1920 Clay Rd	Austell	30106	Cobb County	Cobb County	No	No	No	Yes	(770) 819-2611	2,081	132	15.8	90.3%	122 (5.9%)	1,141 (54.8%)	738 (35.5%)	22 (1.1%)	1 (0.0%)	4 (0.2%)	53 (2.5%)	47.4	178^th of 455 public high schools	60.9%		42.8	210^th of 451 public high schools	53.4%	32	37.4	40.7	50.6				$15,348	$892	$14,456
Lassiter High School	Public	9-12	2601 Shallowford Rd	Marietta	30066	Cobb County	Cobb County	No	No	No	No	(678) 494-7863	2,005	111	18.1	13.6%	1,336 (66.6%)	146 (7.3%)	234 (11.7%)	168 (8.4%)	6 (0.3%)	1 (0.0%)	114 (5.7%)	88.5	15^th of 455 public high schools	96.7%		91.9	18^th of 451 public high schools	96.0%	3	74.9	79.6	80.5				$13,092	$323	$12,769
Pope High School	Public	9-12	3001 Hembree Rd NE	Marietta	30062	Cobb County	Cobb County	No	No	No	No	(770) 578-7900	1,793	103	17.3	10.1%	1,266 (70.6%)	99 (5.5%)	194 (10.8%)	142 (7.9%)	4 (0.2%)	0 (0.0%)	88 (4.9%)	86.6	20^th of 455 public high schools	95.6%		91.3	19^th of 451 public high schools	95.8%	1	67.3	81.4	78.6				$13,459	$459	$13,000
Harrison High School	Public	9-12	4500 Due West Rd NW	Kennesaw	30152	Cobb County	Cobb County	No	No	No	No	(678) 594-8104	2,224	119	18.6	16.0%	1,489 (67.0%)	308 (13.8%)	206 (9.3%)	103 (4.6%)	7 (0.3%)	1 (0.0%)	110 (4.9%)	86.4	22^nd of 455 public high schools	95.2%		88.1	25^th of 451 public high schools	94.5%	3	75.5	78.3	66.2				$12,550	$425	$12,125
Kennesaw Mountain High School	Public	9-12	1898 Kennesaw Due West Rd NW	Kennesaw	30152	Cobb County	Cobb County	No	No	No	No	(678) 594-8190	1,695	109	15.4	40.6%	566 (33.4%)	535 (31.6%)	335 (19.8%)	152 (9.0%)	2 (0.1%)	5 (0.3%)	100 (5.9%)	81	39^th of 455 public high schools	91.4%		80.9	46^th of 451 public high schools	89.8%	7	66.4	73.4	59.5				$14,708	$388	$14,320
Kell High School	Public	9-12	4770 Lee Waters Rd	Marietta	30066	Cobb County	Cobb County	No	No	No	No	(678) 494-7844	1,587	92	17.2	43.2%	682 (43.0%)	393 (24.8%)	360 (22.7%)	43 (2.7%)	5 (0.3%)	1 (0.1%)	103 (6.5%)	73.8	57^th of 455 public high schools	87.5%		78.1	52^nd of 451 public high schools	88.5%	5	56.3	63.8	64.7				$13,530	$397	$13,133
Hillgrove High School	Public	9-12	4165 Luther Ward Rd	Powder Springs	30127	Cobb County	Cobb County	No	No	No	No	(678) 331-3961	2,282	125	18.2	30.3%	890 (39.0%)	822 (36.0%)	360 (15.8%)	79 (3.5%)	4 (0.2%)	3 (0.1%)	124 (5.4%)	79.4	40^th of 455 public high schools	91.2%		83	41^st of 451 public high schools	90.9%	1	67.1	69.8	56.8				$12,833	$380	$12,452
Allatoona High School	Public	9-12	3300 Dallas Acworth Hwy NW	Acworth	30101	Cobb County	Cobb County	No	No	No	No	(770) 975-6503	1,560	98	15.9	29.4%	881 (56.5%)	298 (19.1%)	236 (15.1%)	55 (3.5%)	2 (0.1%)	3 (0.2%)	85 (5.4%)	71.9	61^st of 455 public high schools	86.6%		78.7	51^st of 451 public high schools	88.7%	10	53.7	60.7	64.1				$14,230	$329	$13,901
Cobb Horizon High School	Public, Virtual	6-12	1765 The Exchange SE	Atlanta	30339	Cobb County	Cobb County	No	No	Yes	No	(678) 594-8240	927	73	12.7	92.1%	212 (22.9%)	327 (35.3%)	315 (34.0%)	19 (2.0%)	5 (0.5%)	2 (0.2%)	47 (5.1%)	11.3	407^th of 455 public high schools	10.5%		18.8	365^th of 451 public high schools	19.1%	42	13.1	22.6	12.0	18.6	24.4	11.6
Marietta High School	Public	9-12	1171 Whitlock Ave SW	Marietta	30064	Cobb County	Marietta City	No	No	No	Yes	(770) 428-2631	2,526	176	14.3	56.7%	539 (21.3%)	848 (33.6%)	1,003 (39.7%)	29 (1.1%)	3 (0.1%)	4 (0.2%)	100 (4.0%)	56.2	131^st of 455 public high schools	71.2%		50.3	165^th of 451 public high schools	63.4%	34	51.3	55.6	38.6				$16,079	$518	$15,561
George W. Hartmann Center	Public	6-12	729 Lawrence St NE	Marietta	30060	Cobb County	Marietta City	No	No	No	No	(770) 971-7801	4	1	4.0		1 (25.0%)	0 (0.0%)	3 (75.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)

SchoolDigger rankings lists for Georgia:

Elementary Schools Middle Schools High Schools Districts Cities

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Georgia Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.