101 Largest High Schools in the United States – 2025
November 1, 2025
Did you know that there are over 20,000 high schools in the United States? With so many choices, picking the right high school might not be as easy as a one-size-fits-all decision. For example, while some students may like a more individualized approach at a small campus, others may enjoy attending a large institution. In fact, there are probably many high schoolers who would love to enroll in the largest high school in America.
However, during the onset of the pandemic, a lot of students saw a shift toward online instruction. Since then, there’s been a huge surge in the popularity of online instruction. Even now, a lot of students, including high schoolers, still opt for this choice.
Understandably, it’s no surprise that the largest high schools in United States are often online schools. Because there’s no need for a physical campus, the school is able to enroll more students.
Because of this, we’ve decided to break up this article into two sections. To start, we’ll show you a list of the largest high schools in United States that are fully remote options, or schools that offer online-only instruction. Because of the flexibility in learning, this option is increasingly popular, especially since students from all over the state are usually able to partake in online instruction at the same high school.
Secondly, we will provide a list of the largest high schools in the United States that are brick-and-mortar—or physical—locations.
Before we start, it is important to note that a lot of these online schools are intuitions that serve students in grades from elementary through high school. However, in the write-up provided, we will focus more on the course offerings and opportunities for students in grades 9-12.
Largest High Schools in the United States – Online
1) Commonwealth Charter Academy – Harrisburg, Pennsylvania
- Total Student Enrollment: 23,596 (K-12)
- Average SAT Score: 1140
- Average ACT Score: 24
Commonwealth Charter Academy is one of the largest high schools in the United States in part because it’s an online institution. (A recent graduating class was over 4,400 students.) Overall, the Academy serves students from grades K-12 in all parts of Pennsylvania. Additionally, the school is a charter that is available for no cost to students and their families.
The Academy aims to provide an individualized learning experience for students, with over 2,100 teachers on staff. Throughout the school year, field trips are organized to provide students the ability to meet one another and socialize in a safe and fun setting.
For example, students participate in educational field trips, like visiting museums and historic sites. Plus, students also participate in just-for-fun trips, like petting zoos, bowling, kayaking, and more.
2) Ohio Virtual Academy – Maumee, OH
- Total Student Enrollment: 6,336 (9-12)
- Average SAT Score: 1180
- Average ACT Score: 24
An online high school, the Ohio Virtual Academy is a charter school which offers public school education in an at-home setting. Open to full-time Ohio residents, students here can work at their own pace and enjoy scheduling flexibility. The school is tuition-free and available for students in grades K-12.
All families who enroll at this school enjoy benefits provided by the district. For example, families receive a loaner computer, printer, and even an internet stipend to help make student education more accessible. Students at the high school level attend synchronous, live classes in the “Class Connect” series.
While most work is online, high school students are expected to commit to 6 hours per day, or 30 hours per week, to their coursework.
3) Seton Home Study School – Front Royal, Virginia
- Total Student Enrollment: 14,000+ (K-12)
- Average SAT Score: 1167
- Average ACT Score: 23.6
An online school for grades pre-K-12, Seton Home Study is Catholic-focused, “Christ-centered” homeschooling. At this institution, students must pay tuition and fees to enroll, but the cost is dependent on the amount of students enrolled at one time and other factors, like grade level. Included with enrollment, students receive textbooks, daily lesson plans, online resources, academic counseling, and more.
At the high school level, students must complete a total of 22 credits. To earn these credits, students take required core classes like English, two years of a foreign language, mathematics, science, social studies, and theology. Additionally, students must select an elective course.
Typically, students take 5.5-6 credits per year. It is recommended that high school students complete elective courses such as personal finance, American Literature, and creative writing before graduation.
4) Texas Virtual Academy at Hallsville – Hallsville, Texas
- Total Student Enrollment: 10,969 (9-12)
- Average SAT Score: 1039
- Average ACT Score: 17.8
A tuition-free online program, this campus serves students from grades 3-12.
At the high school level, students have the option to enroll in honors and AP courses. Eventually, students in these AP classes can take the exam to earn college credit in courses like Psychology, Calculus, Macroeconomics, and more. Students will attend these courses in online synchronous sessions.
Additionally, the high school has partnered with the University of Texas of the Permian Basin. Students in grades 11 and 12 can enroll, tuition-free, in up to two courses per semester to start earning college credit. Overall, students must earn a “C” or higher in these courses to earn credit.
5) The Keystone School – Reston, Virginia
- Total Student Enrollment: 10,000+ (pre-K-12)
- Average SAT Score: 1210
- Average ACT Score: 25
With flexible learning options for students in grades K-12, The Keystone School allows to students to learn with self-paced study.
High school students have the option to enroll in advanced placement classes, such as US History, Computer Science Principles, and more. Additionally, students can enroll in elective classes, like animation, creative writing, and even culinary arts and digital photography. Fun fact: Maria Sharapova reportedly attended the Keystone School.
While students must pay a fee to enroll in classes, students are also welcome to transfer into the school from another institution. As well, students can also recover credits to help stay on track for graduation. There are more than 40 credit recovery classes available.
6) Silicon Valley High School – Las Vegas, Nevada
- Total Student Enrollment: 10,000+ (9-12)
- Average SAT Score: 1300
- Average ACT Score: N/A
Founded in 2013, the high school is an AI software-driven accredited school for students in grades 9-12. (It’s high-tech-sounding name belies its janky, very awkward website.) Students can either earn a diploma from this school or take courses to supplement their credits from another campus.
At $125/course, students are able to browse a large catalog of course offerings. For example, students can take American Sign Language, astronomy, film history, and environmental science courses in addition to core classes. All classes are video-based and typically require 75 hours of study.
It is important to note that no textbooks or manuals will be issued, but there are online materials to accompany classroom videos.
7) Pennsylvania Cyber Charter School (PA Cyber) – Midland, Pennsylvania
- Total Student Enrollment: 10,445 (K-12)
- Average SAT Score: 1140
- Average ACT Score: 25
A tuition-free program for all students living in the Commonwealth of Pennsylvania, this school serves students from grades K-12.
High school students are able to take advantage of blended learning classrooms for greater flexibility. This means students can combine asynchronous learning with direct instruction. Additionally, students also have access to peer tutoring services. In fact, students in grades 10-12 who prove to be high-achieving in their classes can tutor younger students.
There are also gifted & talented programs available at this campus. Some students who participated in these programs went on to study at colleges like Cornell, Drexel, Penn State, and Princeton University, among others.
8) Texas Connections Academy – Houston, Texas
- Total Student Enrollment: 4,859 (9-12)
- Average SAT Score: 1160
- Average ACT Score: 26
This program is a tuition-free, statewide online school for students in grades 3-12. Upon enrolling, families receive free learning materials. For example, students receive textbooks and support from Texas-certified teachers.
At this school, learning is individualized to meet the student where they are. Rated highly for its college prep, this school’s teachers work with students to set goals for their learning to prepare for college, technical training, and the workforce.
9) Epic Charter Schools – Oklahoma City, Oklahoma
- Total Student Enrollment: 27,054 (3-12)
- Average SAT Score: 1170
- Average ACT Score: 23
Oklahmoma’s largest public virtual charter school, students are encouraged to work and learn at their own pace. Furthermore, the school is also tuition-free. (You should be aware that there have been recent layoffs and rumors of mismanagement.)
Additionally, students can take advantage of the Epic Collegiate Academy to earn dual credit toward a college degree. Students can also take AP classes in a wide variety of subjects, like Art History, psychology, US history, biology, and more.
10) Georgia Cyber Academy – Atlanta, Georgia
- Total Student Enrollment: 3,243 (9-12)
- Average SAT Score: 1140
- Average ACT Score: 23
Serving over 159 counties in the state, this school is a tuition-free program for students in grades K-12. Interestingly, this online program is ranked as the #1 online high school in the state (NB: It’s ranked #299 among high schools in the state).
High school students at this campus can partake in several dual enrollment programs with public, technical, and private institutions. Additionally, students can also participate in work-based learning to gain practical experience early to meet their career goals.
For students looking to challenge themselves academically, high schoolers can take honors and AP courses, like statistics, US history, biology, and more. Qualifying students can also take AP courses in even more subject areas, like European History, physics, and computer science, among others.
11) Visions in Education – Gold River, California
- Total Student Enrollment: 3,543 (9-12)
- Average SAT Score: 1200
- Average ACT Score: 26
12) South Carolina Connections Academy – Columbia, South Carolina
- Total Student Enrollment: 2,801 (9-12)
- Average SAT Score: 1120
- Average ACT Score: 23
13) GOAL High School – Pueblo, Colorado
- Total Student Enrollment: 6,142
- Average SAT Score: 1050
- Average ACT Score: 22
14) Indiana Connections Academy – Indianapolis, Indiana
- Total Student Enrollment: 5,475 (K-12)
- Average SAT Score: 1130
- Average ACT Score: 24
15) Florida Virtual High School – Orlando, Florida
- Total Student Enrollment: 4,037
- Average SAT Score: 1150
- Average ACT Score: 24
Largest High Schools in the United States – Brick-and Mortar
Now, let’s take a look at the largest high schools in the United States that are physical campuses. We will provide the name of the school, its location, and total student population in the chart below.
#1-#19
| Rank | School | Location | Total Student Population |
| 1. | Brooklyn Technical High School | Brooklyn, NY | 5,810 |
| 2. | Allen High School | Allen, TX | 5,273 |
| 3. | Carmel High School | Carmel, IN | 5,200 |
| 4. | Conroe High School | Conroe, TX | 5,178 |
| 5. | Brentwood High School | Brentwood, NY | 4,803 |
| 6. | Reading Senior High School | Reading, PA | 4,779 |
| 7. | Broken Arrow High School | Broken Arrow, OK | 4,672 |
| 8. | Cypress Bay High School | Weston, FL | 4,632 |
| 9. | Adlai E. Stevenson High School | Lincolnshire, IL | 4,632 |
| 10. | Duncanville High School | Duncanville, TX | 4,607 |
| 11. | Alexandria City High School | Alexandria, VA | 4,551 |
| 12. | Lake Nona High School | Orlando, FL | 4,546 |
| 13. | North Shore Senior High School | Houston, TX | 4,534 |
| 14. | The Woodlands High School | The Woodlands, TX | 4,498 |
| 15. | Eleanor Roosevelt High School | Eastvale, CA | 4,464 |
| 16. | Francis Lewis High School | Fresh Meadows, NY | 4,406 |
| 17. | John A. Ferguson Senior High School | Miami, FL | 4,389 |
| 18. | Upper Darby High School | Upper Darby, PA | 4,388 |
| 19. | Waukegan High School | Waukegan, IL | 4,325 |
#20-#43
| 20. | Lewisville High School | Lewisville, TX | 4,162 |
| 21. | Permian High School | Odessa, TX | 4,162 |
| 22. | Elsik High School | Houston, TX | 4,119 |
| 23. | Coppell High School | Coppell, TX | 4,013 |
| 24. | East Aurora High School | Aurora, IL | 4,019 |
| 25. | Deer Park High School | Deer Park, Texas | 3,991 |
| 26. | Klein Cain High School | Klein, TX | 3,987 |
| 27. | Fort Hamilton High School | Brooklyn, NY | 3,984 |
| 28. | Long Beach Polytechnic High School | Long Beach, CA | 3,954 |
| 29. | Downey High School | Downey, CA | 3,936 |
| 30. | Hamilton High School | Chandler, Arizona | 3,926 |
| 31. | Dorman High School | Roebuck, SC | 3,925 |
| 32. | Midwood High School at Brooklyn College | Brooklyn, NY | 3,908 |
| 33. | Hazleton Area High School | Hazle Township, PA | 3,884 |
| 34. | Brookwood High School | Snellville, GA | 3,880 |
| 35. | Warren Central High School | Indianapolis, Indiana | 3,868 |
| 36. | Mustang High School | Mustang, OK | 3,858 |
| 37. | Hastings High School | Houston, TX | 3,858 |
| 38. | Penn High School | Mishawaka, IN | 3,847 |
| 39. | Cherry Creek High School | Greenwood Village, CO | 3,829 |
| 40. | Lockport Township High School | Lockport, IL | 3,817 |
| 41. | Tottenville High School | Staten Island, NY | 3,797 |
| 42. | Atascocita High School | Humble, TX | 3,790 |
| 43. | Skyline High School | Dallas, TX | 3,780 |
#44-#65
#66-#84
| 66. | Passaic County Technical Institute | Wayne, NJ | 3,660 |
| 67. | West Aurora High School | Aurora, IL | 3,655 |
| 68. | Bridgeland High School | Cypress, TX | 3,655 |
| 69. | Western High School | Davie, FL | 3,650 |
| 70. | North Central High School | Indianapolis, IN | 3,616 |
| 71. | Ardrey Kell High School | Charlotte, NC | 3,605 |
| 72. | Danbury High School | Danbury, CT | 3,603 |
| 73. | Edward R. Murrow High School | Brooklyn, NY | 3,595 |
| 74. | Edward R. Murrow High School | Brooklyn, NY | 3,595 |
| 75. | Cleveland High School | Cleveland, TX | 3,592 |
| 76. | Brockton High School | Brockton, MA | 3,586 |
| 77. | Evanston Township High School | Evanston, IL | 3,586 |
| 78. | Jenks High School | Jenks, OK | 3,577 |
| 79. | Timber Creek High School | Orlando, FL | 3,574 |
| 80. | MacArthur High School | Houston, TX | 3,573 |
| 81. | United High School | Laredo, TX | 3,567 |
| 82. | Wayzata High School | Plymouth, MN | 3,548 |
| 83. | Paramount High School | Paramount, CA | 3,547 |
| 84. | Etiwanda High School | Etiwanda, CA | 3,540 |
#85-#101
| 85. | Pittsburg Senior High School | Pittsburg, CA | 3,532 |
| 86. | Newburgh Free Academy — Main Campus | Newburgh, NY | 3,521 |
| 87. | Santiago High School | Corona, CA | 3,517 |
| 88. | Union High School | Tulsa, OK | 3,516 |
| 89. | Katy High School | Katy, TX | 3,500 |
| 90. | Cypress Ranch High School | Cypress, TX | 3,498 |
| 91. | J. Sterling Morton West High School | Berwyn, IL | 3,497 |
| 92. | William Mason High School | Mason, OH | 3,488 |
| 93. | Chandler High School | Chandler, AZ | 3,487 |
| 94. | Minnetonka Senior High School | Minnetonka, MN | 3,482 |
| 95. | Avon High School | Avon, IN | 3,480 |
| 96. | Grayson High School | Loganville, GA | 3,480 |
| 97. | J. Sterling Morton East High School | Cicero, IL | 3,474 |
| 98. | Warren High School | Downey, CA | 3,471 |
| 99. | Red Mountain High School | Mesa, AZ | 3,469 |
| 100. | Klein Forest High School | Klein, TX | 3,453 |
| 101. | Wilson High School | Long Beach, CA | 3,452 |
Largest High Schools in America – In Review
There are certain benefits to attending large high schools. Many of these large schools have the capacity to offer more student organizations, which means a wide variety of extracurriculars to choose from. Students are usually offered more AP courses and even dual enrollment opportunities to start earning college credit early. Even online high schools can offer rigorous and competitive academics.
Additionally, there will be a larger selection of classes, likely because there are more faculty and staff available to teach them. So, in some cases, students may be able to take classes in a more niche subject or interest.
Overall, whether a high school has a few hundred students or a few thousand, their goals are all the same. Teachers and staff want to ensure that students are prepared and well-equipped to make the best decisions about their future post-graduation. Whether they attend a four-year college, enter the workforce, or take a gap year, their high school education will set them up for success in all they do.
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