Smallest Average Class Size

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All Schools 
400+ students
400+ students 
200-400 students
200-400 students 
< 200 students
< 200 students 
More
Among "All-Boys Schools", view the boarding schools with the smallest average class sizes (2021).
Keep in mind that small statistical differences in average class sizes between schools do not always indicate better student performance at one school or another.
Also keep in mind that boarding schools in general have smaller average class sizes than public schools - even for schools with larger class sizes, a "large" class in a boarding school would still often be considered small by public school standards which often have class sizes of 20 students.

Smallest Average Class Size (2021)

Among All-Boys Schools (out of 33 schools)

Sorted by range (alphabetically within range)
  • Boarding School # Students Grades Location
  • 1.Rank: #1
    The Greenwood School
    The Greenwood School Photo - "Makers of Vermont" is a signature program at The Greenwood School in VT, where students learn to craft metal objects and tools in our blacksmith's forge.
    All-Boys 
    4
    Grades: 6-12
    14 Greenwood Lane
    Putney, VT 05346
    (802) 387-4545
  • 2.Rank: #2
    Grand River Academy
    Grand River Academy Photo
    All-Boys 
    (1)
    6
    Grades: 9-12, PG
    3042 College St.
    Austinburg, OH 44010
    (440) 275-2811
  • 3.Rank: #3
    The Phelps School
    The Phelps School Photo - We are live and in person!
    All-Boys 
    (1)
    7
    Grades: 6-12, PG
    583 Sugartown Road
    Malvern, PA 19355
    (610) 644-1754
  • 4.Rank: #4
    St. Thomas More School
    St. Thomas More School Photo
    All-Boys  (Catholic)
    8
    Grades: 8-12, PG
    45 Cottage Road
    Oakdale, CT 06370
    (860) 823-3861
  • 5.-6.Rank: #5-6
    Blue Ridge School
    Blue Ridge School Photo - Our lake offers students a chance to relax, fish, canoe - in the center of campus.
    All-Boys  (Episcopal)
    (7)
    9
    Grades: 9-12
    273 Mayo Drive
    St. George, VA 22935
    (434) 985-2811
  • 5.-6.Rank: #5-6
    Woodberry Forest School
    Woodberry Forest School Photo
    All-Boys 
    (2)
    9

    Grades: 9-12
    241 Woodberry Station
    Woodberry Forest, VA 22989
    (888) 798-9371
  • 7.-9.Rank: #7-9
    Eaglebrook School
    Eaglebrook School Photo - Eaglebrook School teaches middle school boys the skills they will need for the rest of their lives. Learn more about our Core Skills at https://www.eaglebrook.org/coreskills.
    All-Boys 
    (1)
    10
    Grades: 6-9
    271 Pine Nook Road, P.O. Box 7
    Deerfield, MA 01342
    (413) 774-9111
  • 7.-9.Rank: #7-9
    Fishburne Military School
    Fishburne Military School Photo
    All-Boys 
    (6)
    10

    Grades: 7-12
    225 S. Wayne Avenue
    Waynesboro, VA 22980
    (540) 946-7706
  • 7.-9.Rank: #7-9
    Hargrave Military Academy
    Hargrave Military Academy Photo - Respect! Integrity! Success! Earn it at Hargrave!
    All-Boys  (Baptist)
    (4)
    10

    Grades: 7-12, PG
    200 Military Drive
    Chatham, VA 24531
    (800) 432-2480
  • 10.-13.Rank: #10-13
    Christ School
    Christ School Photo
    All-Boys  (Episcopal)
    (1)
    11
    Grades: 8-12
    500 Christ School Road
    Asheville, NC 28704
    (828) 684-6232
  • 10.-13.Rank: #10-13
    The Kiski School
    The Kiski School Photo - Kiski's outdoor classroom and project-based learning culture gives boys the opportunity to get out of traditional four-walled classrooms and experience the beautiful scenery that Western Pennsylvania autumn offers! With our dedicated STEAM and Makerspace areas, young men get to roll up their sleeves and enjoy hands-on learning!
    All-Boys 
    11

    Grades: 9-12, PG
    1888 Brett Lane
    Saltsburg, PA 15681
    (724) 639-8035
  • 10.-13.Rank: #10-13
    Marine Military Academy
    Marine Military Academy Photo - Nearly all MMA graduates earn acceptance at the college level or appointment to the service academies. Many matriculate to top-tier universities throughout the United States and the world: Arizona State University; Auburn University; Babson College; Baylor University; Berklee College of Music; Boston College; California Maritime Academy; California Polytechnic State University; California State: Chico; California State: Fullerton; California State: Sacramento; Carnegie Mellon University; Chaminade University of Hawaii; Clemson University;College of the Ozarks ; Colorado School of Mines; Colorado State University; Cornell University; Daniel Webster College; DePauw University; Delta State University; Duquesne University; East Carolina University; Embry Riddle University ; Florida Atlantic University; Florida International University ; Florida State University; Great Lakes Maritime Academy; Hawaii Pacific University; Houston Baptist University; Johnson & Wales University; Incarnate Word University; Illinois Institute of Technology; Indiana University; Lehigh University; Louisiana State University; Massachusetts Institute of Technology; Massachusetts Maritime Academy; McMurray University; Michigan State University; Montana State University; Murray State University; New Mexico Institute of Technology; New Mexico State University; North Carolina State; North Georgia State College; Northern Arizona University; Northeastern University; Norwich University; Ohio State University; Oklahoma State University; Otterbein College; Penn State; Purdue University; Rensselaer Polytechnic Institute; Rice University; Rochester Institute of Technology; Sam Houston State University; San Diego State University; San Francisco State University; San Jose State University; Santa Clara University; Sarah Lawrence College; Sonoma State University; Southern Methodist University; Southern New Hampshire University ; Southwestern University; St. Edward’s University; St. Louis University; St. John’s University; St. Mary’s University; Stephen F. Austin University; Swarthmore; Texas A & M University; Texas A & M at Commerce; Texas A&M at Corpus Christi; Texas A & M at Galveston; Texas A & M at Kingsville; Texas Christian University; Texas Lutheran University; Texas State University; Texas Tech University; The Citadel; Trinity University; Tulane University; United States Air Force Academy; United States Merchant Marine Academy; United States Military Academy; United States Naval Academy; University of Alabama; University of Alaska: Anchorage; University of Arizona; University of California: Davis; University of California: Northridge; University of Central Florida; University of Chicago; University of Cincinnati; University of Colorado; University of Denver; University of Georgia; University of Houston; University of Louisiana at Lafayette; University of Massachusetts: Boston; University of Miami; University of Mississippi; University of Missouri: Rolla; University of Nebraska; University of Nevada: Las Vegas; University of North Carolina: Charlotte; University of North Dakota; University of North Texas; University of Oklahoma; University of Oregon; University of Puget Sound; University of Southern California; University of St. Thomas; University of The South (Sewanee); University of Texas at Austin; University of Texas at Arlington University of Texas at Dallas; University of Texas at San Antonio; University of Tulsa; University of Washington; University of Wyoming; Villanova University; Virginia Military Institute; Virginia Tech University; Wabash College; Webster University; West Virginia University; Westminster College; Yale University; London School of Economics (UK); University of Manchester (UK)…just to name a few!
    All-Boys 
    11

    Grades: 7-12, PG
    320 Iwo Jima Blvd
    Harlingen, TX 78550
  • 10.-13.Rank: #10-13
    Valley Forge Military Academy
    Valley Forge Military Academy Photo - VFMA offers college preparatory academics, credentialed faculty, competitive PIAA athletics, and individual attention, providing cadets with an environment focused on their academic success.
    All-Boys 
    (2)
    11

    Grades: 7-12
    1001 Eagle Road
    Wayne, PA 19087
    (610) 989-1200
  • 14.-23.Rank: #14-23
    Avon Old Farms School
    Avon Old Farms School Photo - Nestled among Cotswold-inspired architecture on 860 acres in the Farmington Valley, Avon Old Farms stands as the leader in preparing boys to become men.
    All-Boys 
    (6)
    12
    Grades: 9-12, PG
    500 Old Farms Road
    Avon, CT 06001
    (800) 464-2866
  • 14.-23.Rank: #14-23
    Bridgton Academy
    Bridgton Academy Photo - Our Humanities Center is one of two academic buildings on campus, and the hub for our academic administration, Focused Academic Coaching, Academic Support, and the Marcella/Sands Lecture Hall.
    All-Boys 
    12

    Grades: 11-12, PG
    PO Box 292
    North Bridgton, ME 04057
    (207) 647-3322
  • 14.-23.Rank: #14-23
    Camden Military Academy
    Camden Military Academy Photo - A Proud Family!
    All-Boys 
    (13)
    12

    Grades: 7-12, PG
    520 Hwy. 1 North
    Camden, SC 29020
    (800) 948-6291
  • 14.-23.Rank: #14-23
    Cardigan Mountain School
    Cardigan Mountain School Photo
    All-Boys 
    (2)
    12

    Grades: 6-9
    62 Alumni Drive
    Canaan, NH 03741
    (603) 523-3548
  • 14.-23.Rank: #14-23
    Fork Union Military Academy
    Fork Union Military Academy Photo - The cadets in parade formation. The first full dress parade of the year begins usually at the end of April and is on Sunday.
    All-Boys  (Baptist)
    (6)
    12

    Grades: 7-12, PG
    P.O. 278, 4744 James Madison Hwy
    Fork Union, VA 23055
    (800) 462-3862
  • 14.-23.Rank: #14-23
    Hillside School
    Hillside School Photo
    All-Boys 
    12

    Grades: 4-9
    404 Robin Hill Street
    Marlborough, MA 01752
    (508) 485-3483
  • 14.-23.Rank: #14-23
    Riverside Military Academy
    Riverside Military Academy Photo - Riverside Military Academy cadet officers stand at attention during a parade on Maginnis Field.
    All-Boys 
    (5)
    12

    Grades: 6-12
    2001 Riverside Drive
    Gainesville, GA 30501
    (800) 462-2338
  • 14.-23.Rank: #14-23
    Salisbury School
    Salisbury School Photo - Salisbury School
    All-Boys 
    (2)
    12

    Grades: 9-12, PG
    251 Canaan Road
    Salisbury, CT 06068
    (860) 435-5732
  • 14.-23.Rank: #14-23
    Southern Preparatory Academy
    Southern Preparatory Academy Photo - 2019 NHSA Division 2 National Champions in 8-Man Football
    All-Boys 
    (4)
    12

    Grades: 6-12
    174 Ward Circle
    Camp Hill, AL 36850
    (256) 675-6260
  • 14.-23.Rank: #14-23
    Trinity-Pawling School
    Trinity-Pawling School Photo - Find your home away from home on our stunning 230-acre campus. We're a buzzing community, with 8 dorms, state-of-the-art athletic facilities, a chapel, and an Arts Center with a theater and painting studios. Zip into New York City by train for cultural activities, or enjoy the great outdoors just minutes from campus.
    All-Boys  (Episcopal)
    12

    Grades: 8-12, PG | 7-12, PG (day)
    700 Route 22
    Pawling, NY 12564
    (845) 855-4825
  • 24.Rank: #24
    McCallie School
    McCallie School Photo - McCallie's academic programs go beyond merely mastering the necessary material. They excel at teaching students to think. McCallie does not teach courses or subjects; McCallie teaches boys.
    All-Boys 
    (3)
    13
    Grades: 9-12, PG | 6-12, PG (day)
    500 Dodds Avenue
    Chattanooga, TN 37404
    (800) 234-2163
  • 25.-26.Rank: #25-26
    Missouri Military Academy
    Missouri Military Academy Photo - Established in 1889, Missouri Military Academy has transformed young men into leaders who are well-educated, prepared gentlemen of character. Our long history and distinct traditions inspire a sense of pride and duty among the young men who seek to fulfill their potential at MMA.
    All-Boys 
    (5)
    14
    Grades: 7-12, PG
    204 Grand Street
    Mexico, MO 65265
    (573) 581-1776
  • 25.-26.Rank: #25-26
    Mount Michael Benedictine School
    Mount Michael Benedictine School Photo
    All-Boys  (Catholic)
    14

    Grades: 9-12
    22520 Mount Michael Road
    Elkhorn, NE 68022
    (402) 238-1457
  • 27.-29.Rank: #27-29
    Army and Navy Academy
    Army and Navy Academy Photo
    All-Boys 
    (4)
    15
    Grades: 7-12
    2605 Carlsbad Blvd.
    Carlsbad, CA 92008
    (888) 762-2338
  • 27.-29.Rank: #27-29
    Robert Land Academy
    Robert Land Academy Photo - Robert Land Academy enrolls approximately 125 young men each year in grades 5 through 12. Eighty percent come from across Canada, with the remaining 20% coming from the United States, Germany, Hong Kong, China, Mexico, The Caribbean and elsewhere around the world. They represent a broad diversity of ethnic and religious backgrounds.
    All-Boys 
    15

    Grades: 5-12
    6727 South Chippawa Rd
    Wellandport, Ontario, Canada 12345
    (905) 386-6203
  • 27.-29.Rank: #27-29
    Subiaco Academy
    Subiaco Academy Photo - Subiaco Students with Father Cassian
    All-Boys  (Catholic)
    (1)
    15

    Grades: 7-12
    405 North Subiaco Avenue
    Subiaco, AR 72865
    (479) 422-9775
  • 30.-33.Rank: #30-33
    Georgetown Preparatory School
    Georgetown Preparatory School Photo - Average class size is 16. Student to teacher ratio is 8:1. Boarding Faculty to Student Ratio is 1:5
    All-Boys  (Catholic)
    (3)
    >15
    Grades: 9-12
    10900 Rockville Pike
    North Bethesda, MD 20852
    (301) 214-1215
  • 30.-33.Rank: #30-33
    Chaminade College Preparatory School
    Chaminade College Preparatory School Photo - Chaminade is located 20 minutes outside of Downtown St. Louis in the lovely, green neighborhood of Creve Coeur. Our 55 acre campus is fun and lively throughout the school year and a wonderful place not only to study and play but also to become part of the family.
    All-Boys  (Catholic)
    >15

    Grades: 6-12
    425 South Lindbergh Blvd.
    St. Louis, MO 63131
    (314) 692-6640
  • 30.-33.Rank: #30-33
    St. George's School, Vancouver
    St. George's School, Vancouver Photo - St. George's School, Vancouver is an all-boys university preparatory school in Canada. The school offers a Canadian curriculum containing 100+ courses and 26 Advanced Placement subjects.
    All-Boys 
    >15

    Grades: 8-12 | 1-12 (day)
    4175 West 29th Avenue
    Vancouver, BC, Canada V6S1V1
    (604) 221-3890
  • 30.-33.Rank: #30-33
    Saint Stanislaus High School
    Saint Stanislaus High School Photo - Mr. Anderson's chemistry class gets to perform cool experiments!
    All-Boys  (Catholic)
    >15

    Grades: 7-12
    304 S. Beach Blvd.
    Bay St. Louis, MS 39520
    (228) 467-9057

Top School Listings by Category (2021)

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Selectivity
Lowest acceptance rates
Student Test Scores
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Student Test Scores
Highest average SSAT score
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Least expensive tuition
Affordability
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Student Attention
Smallest average class sizes
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Faculty Education
Highest percentage of faculty with advanced degrees
Boarding Focus
Highest percentage of boarding students
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Diversity
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Community Size
Largest student body (number of students)
Community Size
Smallest student body (number of students)
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