Largest Schools in Cobb County (2025)

Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 100 schools in Cobb County, Georgia. Rank positions shown on each profile are within United States and Georgia.

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Campbell High School Smyrna · High · Grades 9–12	Public	3,085	44.0 Lower 50%	37% Math proficiency	3,085
2	Osborne High School Marietta · High · Grades 9–12	Public	2,790	16.6 Lower 50%	17% Math proficiency	2,790
3	Walton High School Marietta · High · Grades 9–12	Charter	2,705	84.6 Top 5%	89% Math proficiency	2,705
4	Pebblebrook High School Mableton · High · Grades 9–12	Public	2,574	24.1 Lower 50%	30% Math proficiency	2,574
5	North Cobb High School Kennesaw · High · Grades 9–12	Public	2,463	51.7 Top 50%	49% Math proficiency	2,463
6	Wheeler High School Marietta · High · Grades 9–12	Public	2,401	54.5 Top 50%	53% Math proficiency	2,401
7	Hillgrove High School Powder Springs · High · Grades 9–12	Public	2,282	71.3 Top 25%	72% Math proficiency	2,282
8	Harrison High School Kennesaw · High · Grades 9–12	Public	2,224	79.4 Top 10%	77% Math proficiency	2,224
9	McEachern High School Powder Springs · High · Grades 9–12	Public	2,175	38.6 Lower 50%	39% Math proficiency	2,175
10	South Cobb High School Austell · High · Grades 9–12	Public	2,081	35.3 Lower 50%	38% Math proficiency	2,081
11	Lassiter High School Marietta · High · Grades 9–12	Public	2,005	82.9 Top 10%	85% Math proficiency	2,005
12	Pope High School Marietta · High · Grades 9–12	Public	1,793	83.2 Top 5%	80% Math proficiency	1,793
13	Sprayberry High School Marietta · High · Grades 9–12	Public	1,769	51.3 Top 50%	44% Math proficiency	1,769
14	Kennesaw Mountain High School Kennesaw · High · Grades 9–12	Public	1,695	64.1 Top 50%	58% Math proficiency	1,695
15	Kell High School Marietta · High · Grades 9–12	Public	1,587	56.9 Top 50%	45% Math proficiency	1,587
16	Allatoona High School Acworth · High · Grades 9–12	Public	1,560	71.0 Top 25%	66% Math proficiency	1,560
17	Campbell Middle School Smyrna · Middle · Grades 6–8	Public	1,368	33.7 Lower 50%	31% Math proficiency	1,368
18	East Cobb Middle School Marietta · Middle · Grades 6–8	Public	1,352	41.0 Lower 50%	44% Math proficiency	1,352
19	Nickajack Elementary School Smyrna · Elementary · Grades PK–5	Public	1,260	54.9 Top 50%	50% Math proficiency	1,260
20	Dickerson Middle School Marietta · Middle · Grades 6–8	Public	1,225	86.8 Top 5%	89% Math proficiency	1,225
21	Lovinggood Middle School Powder Springs · Middle · Grades 6–8	Public	1,209	74.8 Top 25%	67% Math proficiency	1,209
22	Dodgen Middle School Marietta · Middle · Grades 6–8	Public	1,178	88.6 Top 5%	89% Math proficiency	1,178
23	Sope Creek Elementary School Marietta · Elementary · Grades PK–5	Public	1,104	89.0 Top 5%	84% Math proficiency	1,104
24	King Springs Elementary School Smyrna · Elementary · Grades PK–5	Public	1,101	72.2 Top 25%	59% Math proficiency	1,101
25	East Side Elementary School Marietta · Elementary · Grades PK–5	Public	1,072	87.6 Top 5%	81% Math proficiency	1,072
26	McClure Middle School Kennesaw · Middle · Grades 6–8	Public	1,030	77.2 Top 25%	70% Math proficiency	1,030
27	Cheatham Hill Elementary School Marietta · Elementary · Grades PK–5	Public	1,021	68.9 Top 25%	66% Math proficiency	1,021
28	Clay-Harmony Leland Elementary School Mableton · Elementary · Grades PK–5	Public	1,013	27.0 Lower 50%	35% Math proficiency	1,013
29	Cooper Middle School Austell · Middle · Grades 6–8	Public	1,000	36.3 Lower 50%	42% Math proficiency	1,000
30	Griffin Middle School Smyrna · Middle · Grades 6–8	Public	991	41.2 Lower 50%	38% Math proficiency	991
31	Durham Middle School Acworth · Middle · Grades 6–8	Public	984	81.2 Top 10%	72% Math proficiency	984
32	Lost Mountain Middle School Kennesaw · Middle · Grades 6–8	Public	979	83.0 Top 10%	76% Math proficiency	979
33	Teasley Elementary School Smyrna · Elementary · Grades PK–5	Public	974	66.0 Top 50%	56% Math proficiency	974
34	Brumby Elementary School Marietta · Elementary · Grades PK–5	Public	963	29.9 Lower 50%	25% Math proficiency	963
35	Mableton Elementary School Mableton · Elementary · Grades PK–5	Public	945	24.8 Lower 50%	30% Math proficiency	945
36	Hightower Trail Middle School Marietta · Middle · Grades 6–8	Public	944	88.9 Top 5%	89% Math proficiency	944
37	Mabry Middle School Marietta · Middle · Grades 6–8	Public	938	83.3 Top 10%	77% Math proficiency	938
38	Lindley Middle School Mableton · Middle · Grades 6–8	Public	905	20.6 Lower 50%	26% Math proficiency	905
39	Mount Bethel Elementary School Marietta · Elementary · Grades PK–5	Public	898	91.9 Top 5%	84% Math proficiency	898
40	Dowell Elementary School Marietta · Elementary · Grades PK–5	Public	898	38.7 Lower 50%	38% Math proficiency	898
41	Kemp Elementary School Powder Springs · Elementary · Grades PK–5	Public	894	83.6 Top 10%	77% Math proficiency	894
42	Garrett Middle School Austell · Middle · Grades 6–8	Public	891	18.2 Lower 50%	26% Math proficiency	891
43	Simpson Middle School Marietta · Middle · Grades 6–8	Public	884	83.7 Top 10%	75% Math proficiency	884
44	Daniell Middle School Marietta · Middle · Grades 6–8	Public	884	57.1 Top 50%	51% Math proficiency	884
45	Smyrna Elementary School Smyrna · Elementary · Grades PK–5	Public	870	45.8 Lower 50%	40% Math proficiency	870
46	City View Elementary School Mableton · Elementary · Grades PK–5	Public	870	19.1 Lower 50%	21% Math proficiency	870
47	Smitha Middle School Marietta · Middle · Grades 6–8	Public	866	29.2 Lower 50%	33% Math proficiency	866
48	Bryant Elementary School Mableton · Elementary · Grades PK–5	Public	865	20.4 Lower 50%	27% Math proficiency	865
49	Murdock Elementary School Marietta · Elementary · Grades PK–5	Public	847	91.1 Top 5%	88% Math proficiency	847
50	Mountain View Elementary School Marietta · Elementary · Grades PK–5	Public	837	89.8 Top 5%	84% Math proficiency	837
51	Tapp Middle School Powder Springs · Middle · Grades 6–8	Public	809	41.2 Lower 50%	44% Math proficiency	809
52	Pearson Middle School Marietta · Middle · Grades 6–8	Public	806	26.1 Lower 50%	100% Free/reduced-price lunch	806
53	Powder Springs Elementary School Powder Springs · Elementary · Grades PK–5	Public	805	32.5 Lower 50%	38% Math proficiency	805
54	Tritt Elementary School Marietta · Elementary · Grades PK–5	Public	804	91.1 Top 5%	81% Math proficiency	804
55	Palmer Middle School Kennesaw · Middle · Grades 6–8	Public	803	61.6 Top 50%	62% Math proficiency	803
56	Pitner Elementary School Acworth · Elementary · Grades PK–5	Public	802	61.6 Top 50%	54% Math proficiency	802
57	Hayes Elementary School Kennesaw · Elementary · Grades PK–5	Public	802	45.5 Lower 50%	41% Math proficiency	802
58	Bullard Elementary School Kennesaw · Elementary · Grades PK–5	Public	799	77.0 Top 25%	63% Math proficiency	799
59	Barber Middle School Acworth · Middle · Grades 6–8	Public	790	57.0 Top 50%	52% Math proficiency	790
60	Clarkdale Elementary School Austell · Elementary · Grades PK–5	Public	785	29.9 Lower 50%	41% Math proficiency	785
61	Floyd Middle School Mableton · Middle · Grades 6–8	Public	776	21.8 Lower 50%	27% Math proficiency	776
62	Still Elementary School Powder Springs · Elementary · Grades PK–5	Public	755	73.9 Top 25%	60% Math proficiency	755
63	Pickett's Mill Elementary School Acworth · Elementary · Grades PK–5	Public	753	77.7 Top 25%	69% Math proficiency	753
64	Ford Elementary School Acworth · Elementary · Grades PK–5	Public	750	87.1 Top 5%	79% Math proficiency	750
65	Baker Elementary School Acworth · Elementary · Grades PK–5	Public	738	67.5 Top 50%	59% Math proficiency	738
66	Birney Elementary School Marietta · Elementary · Grades PK–5	Public	725	22.6 Lower 50%	25% Math proficiency	725
67	Varner Elementary School Powder Springs · Elementary · Grades PK–5	Public	705	51.1 Top 50%	47% Math proficiency	705
68	Bells Ferry Elementary School Marietta · Elementary · Grades PK–5	Public	704	62.5 Top 50%	64% Math proficiency	704
69	Fair Oaks Elementary School Marietta · Elementary · Grades PK–5	Public	703	28.8 Lower 50%	40% Math proficiency	703
70	Betty Gray Middle School Mableton · Middle · Grades 6–8	Public	702	23.2 Lower 50%	32% Math proficiency	702
71	Frey Elementary School Acworth · Elementary · Grades PK–5	Public	691	80.2 Top 10%	70% Math proficiency	691
72	Chalker Elementary School Kennesaw · Elementary · Grades PK–5	Public	679	69.0 Top 25%	58% Math proficiency	679
73	Eastvalley Elementary School Marietta · Elementary · Grades PK–5	Public	679	67.5 Top 50%	59% Math proficiency	679
74	Garrison Mill Elementary School Marietta · Elementary · Grades PK–5	Public	649	86.0 Top 5%	76% Math proficiency	649
75	Norton Park Elementary School Smyrna · Elementary · Grades PK–5	Public	643	30.7 Lower 50%	41% Math proficiency	643
76	Davis Elementary School Marietta · Elementary · Grades PK–5	Public	635	80.8 Top 10%	68% Math proficiency	635
77	Sedalia Park Elementary School Marietta · Elementary · Grades PK–5	Public	634	43.9 Lower 50%	42% Math proficiency	634
78	Due West Elementary School Marietta · Elementary · Grades PK–5	Public	626	85.6 Top 5%	71% Math proficiency	626
79	Sanders Elementary School Austell · Elementary · Grades PK–5	Public	626	25.7 Lower 50%	30% Math proficiency	626
80	Kincaid Elementary School Marietta · Elementary · Grades PK–5	Public	603	80.2 Top 10%	73% Math proficiency	603
81	Vaughan Elementary School Powder Springs · Elementary · Grades PK–5	Public	600	82.4 Top 10%	70% Math proficiency	600
82	Awtrey Middle School Kennesaw · Middle · Grades 6–8	Public	593	62.5 Top 50%	49% Math proficiency	593
83	Compton Elementary School Powder Springs · Elementary · Grades PK–5	Public	593	29.8 Lower 50%	34% Math proficiency	593
84	Shallowford Falls Elementary School Marietta · Elementary · Grades PK–5	Public	591	92.3 Top 5%	81% Math proficiency	591
85	Green Acres Elementary School Smyrna · Elementary · Grades PK–5	Public	584	31.5 Lower 50%	41% Math proficiency	584
86	Blackwell Elementary School Marietta · Elementary · Grades PK–5	Public	580	54.7 Top 50%	47% Math proficiency	580
87	Rocky Mount Elementary School Marietta · Elementary · Grades PK–5	Public	576	84.7 Top 10%	68% Math proficiency	576
88	Addison Elementary School Marietta · Elementary · Grades PK–5	Public	571	77.6 Top 25%	67% Math proficiency	571
89	Russell Elementary School Smyrna · Elementary · Grades PK–5	Public	568	34.8 Lower 50%	38% Math proficiency	568
90	Kennesaw Elementary School Kennesaw · Elementary · Grades PK–2	Public	560	69.9 Top 25%	51.3% Free/reduced-price lunch	560
91	Lewis Elementary School Kennesaw · Elementary · Grades PK–5	Public	550	63.1 Top 50%	58% Math proficiency	550
92	McCleskey Middle School Marietta · Middle · Grades 6–8	Public	540	67.0 Top 50%	53% Math proficiency	540
93	Hendricks Elementary School Powder Springs · Elementary · Grades PK–5	Public	538	31.3 Lower 50%	42% Math proficiency	538
94	Timber Ridge Elementary School Marietta · Elementary · Grades PK–5	Public	529	92.3 Top 5%	87% Math proficiency	529
95	Hollydale Elementary School Marietta · Elementary · Grades PK–5	Public	526	29.2 Lower 50%	36% Math proficiency	526
96	Big Shanty Elementary School Kennesaw · Elementary · Grades 3–5	Public	511	60.7 Top 50%	55% Math proficiency	511
97	Pine Mountain Middle School Kennesaw · Middle · Grades 6–8	Public	506	60.0 Top 50%	52% Math proficiency	506
98	Acworth Elementary School Acworth · Elementary · Grades 2–5	Public	499	47.5 Lower 50%	40% Math proficiency	499
99	Powers Ferry Elementary School Marietta · Elementary · Grades PK–5	Public	475	26.3 Lower 50%	31% Math proficiency	475
100	Riverside Elementary School Mableton · Elementary · Grades PK–5	Public	471	36.6 Lower 50%	100% Free/reduced-price lunch	471

Campbell High School in Smyrna leads the 2025 list of largest schools in Cobb County with Enrollment 3,085. Of the 100 schools shown, 99 are public, 1 are charter.

For the full picture see the wider Georgia largest 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 largest school in Cobb County?

Campbell High School in Smyrna, Georgia ranks first among largest schools in Cobb County with Enrollment 3,085 (Enrollment: 3,085).

How are largest schools in Cobb County ranked?

Schools with the highest enrollment. Only schools eligible for the Success Index (US) are included; the index is shown alongside for context.

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.