Among "All Schools," view the twenty boarding schools with the "oldest founding date." First, some important notes:
- The "founding dates" below are the dates that schools have traditionally listed as the official year of their founding.
- Note that the definition of "founding date" may differ slightly from school to school (e.g., whether it selects the year the school first received its charter or the year it first admitted students - regardless, the differences between the two are often small)
Oldest Founding Date:
Among All Schools (out of 303 schools)
Sorted by range (alphabetically within range)
* Indicates Boarding Grades Offered
Boarding School
|
Type
|
Grades*
|
Year Founded
|
| 1. West Nottingham Academy | Co-Ed | 9-12, PG | 1744 |
| 2. Linden Hall | All-Girls | 5-12, PG | 1746 |
| 3. The Governor's Academy (formerly Governor Dummer Academy) |
Co-Ed | 9-12 | 1763 |
| 4. Salem Academy | All-Girls | 9-12 | 1772 |
| 5. Phillips Academy Andover | Co-Ed | 9-12, PG | 1778 |
| 6. Phillips Exeter Academy | Co-Ed | 9-12, PG | 1781 |
| 7. Georgetown Preparatory School | All-Boys | 9-12 | 1789 |
| 8.-9. Fryeburg Academy | Co-Ed | 9-12, PG | 1792 |
| 8.-9. Washington Academy | Co-Ed | 9-12, PG | 1792 |
| 10. Lawrence Academy | Co-Ed | 9-12 | 1793 |
| 11. Cheshire Academy | Co-Ed | 9-12, PG | 1794 |
| 12. Oakwood Friends School | Co-Ed | 9-12 | 1796 |
| 13. Deerfield Academy | Co-Ed | 9-12, PG | 1797 |
| 14. Milton Academy | Co-Ed | 9-12 | 1798 |
| 15. Westtown School | Co-Ed | 9-12 | 1799 |
| 16. Woodstock Academy | Co-Ed | 9-12, PG | 1801 |
| 17. George Stevens Academy | Co-Ed | 9-12 | 1803 |
| 18.-19. Hebron Academy | Co-Ed | 9-12, PG | 1804 |
| 18.-19. Wilbraham & Monson Academy | Co-Ed | 9-12, PG | 1804 |
| 20. Bridgton Academy | All-Boys | 12-12, PG | 1808 |
Sorted by range (alphabetically within range)
* Indicates Boarding Grades Offered
Boarding School
|
Type
|
Grades*
|
Year Founded
|
| 21. Lawrenceville School | Co-Ed | 9-12, PG | 1810 |
| 22. Thornton Academy | Co-Ed | 9-12 | 1811 |
| 23. Kimball Union Academy | Co-Ed | 9-12, PG | 1813 |
| 24.-25. Emma Willard School | All-Girls | 9-12, PG | 1814 |
| 24.-25. The Linsly School | Co-Ed | 7-12 | 1814 |
| 26.-27. Brewster Academy | Co-Ed | 9-12, PG | 1820 |
| 26.-27. St. John's-Ravenscourt School | Co-Ed | 8-12 | 1820 |
| 28. New Hampton School | Co-Ed | 9-12, PG | 1821 |
| 29. Foxcroft Academy | Co-Ed | 9-12 | 1823 |
| 30. Kents Hill School | Co-Ed | 9-12, PG | 1824 |
| 31. Western Reserve Academy | Co-Ed | 9-12, PG | 1826 |
| 32. Chapel Hill-Chauncy Hall | Co-Ed | 9-12, PG | 1828 |
| 33. Grand River Academy | All-Boys | 9-12, PG | 1831 |
| 34. Suffield Academy | Co-Ed | 9-12, PG | 1833 |
| 35.-36. Carson Long Military Academy | All-Boys | 6-12 | 1836 |
| 35.-36. Gould Academy | Co-Ed | 9-12, PG | 1836 |
| 37. Olney Friends School | Co-Ed | 9-12 | 1837 |
| 38. The Pennington School | Co-Ed | 7-12 | 1838 |
| 39. Episcopal High School | Co-Ed | 9-12 | 1839 |
| 40. The Williston Northampton School | Co-Ed | 9-12, PG | 1841 |
| 41.-44. Pickering College | Co-Ed | 7-12 | 1842 |
| 41.-44. Saint James School | Co-Ed | 8-12 | 1842 |
| 41.-44. St. Johnsbury Academy | Co-Ed | 9-12, PG | 1842 |
| 41.-44. Saint Mary's School | All-Girls | 9-12 | 1842 |
| 45. Miss Porter's School | All-Girls | 9-12 | 1843 |
| 46.-47. Stuart Hall School | Co-Ed | 8-12, PG | 1844 |
| 46.-47. Wyoming Seminary Upper School | Co-Ed | 9-12, PG | 1844 |
| 48. Tilton School | Co-Ed | 9-12, PG | 1845 |
| 49.-50. Blair Academy | Co-Ed | 9-12, PG | 1848 |
| 49.-50. Proctor Academy | Co-Ed | 9-12, PG | 1848 |
| 51.-52. The Gunnery | Co-Ed | 9-12, PG | 1850 |
| 51.-52. San Domenico School | All-Girls | 9-12 | 1850 |
| 53.-54. Buffalo Seminary | All-Girls | 9-12 | 1851 |
| 53.-54. Hill School | Co-Ed | 9-12, PG | 1851 |
| 55. Grier School | All-Girls | 7-12, PG | 1853 |
| 56. St. Stanislaus College-Prep | All-Boys | 7-12, PG | 1854 |
| 57. Wayland Academy | Co-Ed | 9-12 | 1855 |
| 58. St. Paul's School | Co-Ed | 9-12 | 1856 |
| 59.-60. Lake Forest Academy | Co-Ed | 9-12, PG | 1857 |
| 59.-60. Saint John's Preparatory School | Co-Ed | 9-12, PG | 1857 |
| 61. Shattuck-St. Mary's School | Co-Ed | 6-12, PG | 1858 |
| 62. Maur Hill - Mount Academy (MH-MA) | Co-Ed | 8-12 | 1863 |
| 63. Peddie School | Co-Ed | 9-12, PG | 1864 |
| 64.-66. Cushing Academy | Co-Ed | 9-12, PG | 1865 |
| 64.-66. St. Mark's School | Co-Ed | 9-12 | 1865 |
| 64.-66. St. Mary's School | Co-Ed | 9-12 | 1865 |
| 67.-68. Fay School | Co-Ed | 6-9 | 1866 |
| 67.-68. Maine Central Institute | Co-Ed | 9-12, PG | 1866 |
| 69.-72. The Bishop Strachan School | All-Girls | 7-12 | 1867 |
| 69.-72. Lyndon Institute | Co-Ed | 9-12, PG | 1867 |
| 69.-72. Oldfields School | All-Girls | 8-12, PG | 1867 |
| 69.-72. The Storm King School | Co-Ed | 8-12, PG | 1867 |
| 73. St. Andrew's-Sewanee School | Co-Ed | 9-12 | 1868 |
| 74.-75. Oregon Episcopal School | Co-Ed | 9-12 | 1869 |
| 74.-75. Stoneleigh-Burnham School | All-Girls | 7-12, PG | 1869 |
| 76. The Webb School | Co-Ed | 7-12, PG | 1870 |
| 77. Stanstead College | Co-Ed | 7-12 | 1872 |
| 78.-79. Academy of the Holy Family | All-Girls | 9-12 | 1874 |
| 78.-79. The Loomis Chaffee School | Co-Ed | 9-12, PG | 1874 |
| 80.-81. The Perkiomen School | Co-Ed | 6-12, PG | 1875 |
| 80.-81. Wasatch Academy | Co-Ed | 8-12, PG | 1875 |
| 82.-83. Tabor Academy | Co-Ed | 9-12 | 1876 |
| 82.-83. Vermont Academy | Co-Ed | 9-12, PG | 1876 |
| 84.-85. The Masters School | Co-Ed | 9-12 | 1877 |
| 84.-85. Rothesay Netherwood School | Co-Ed | 6-12 | 1877 |
| 86.-87. Miller School of Albemarle | Co-Ed | 8-12, PG | 1878 |
| 86.-87. Oak Hill Academy | Co-Ed | 8-12 | 1878 |
| 88.-91. Chamberlain-Hunt Academy | All-Boys | 7-12 | 1879 |
| 88.-91. Fishburne Military School | All-Boys | 7-12, PG | 1879 |
| 88.-91. Holderness School | Co-Ed | 9-12, PG | 1879 |
| 88.-91. Northfield Mount Hermon School | Co-Ed | 9-12, PG | 1879 |
| 92.-93. The King's Academy | Co-Ed | 7-12 | 1880 |
| 92.-93. Wentworth Military Academy & College | Co-Ed | 9-12, PG | 1880 |
| 94. Dana Hall School | All-Girls | 9-12 | 1881 |
| 95. St. Timothy's School | All-Girls | 9-12, PG | 1882 |
| 96. Houghton Academy | Co-Ed | 9-12, PG | 1883 |
| 97.-100. Annie Wright School | All-Girls | 9-12 | 1884 |
| 97.-100. Groton School | Co-Ed | 8-12 | 1884 |
| 97.-100. The Howe School and Summer Camp | Co-Ed | 7-12 | 1884 |
| 97.-100. St. John's Northwestern Military Academy | All-Boys | 7-12, PG | 1884 |
| 101.-102. The Cambridge School of Weston | Co-Ed | 9-12, PG | 1886 |
| 101.-102. The White Mountain School | Co-Ed | 9-12, PG | 1886 |
| 103.-104. St. John's Military School | All-Boys | 5-12 | 1887 |
| 103.-104. Subiaco Academy | All-Boys | 7-12 | 1887 |
| 105.-106. The Kiski School | All-Boys | 9-12, PG | 1888 |
| 105.-106. Westminster School | Co-Ed | 9-12, PG | 1888 |
| 107.-113. Hoosac School | Co-Ed | 8-12, PG | 1889 |
| 107.-113. Missouri Military Academy | All-Boys | 6-12, PG | 1889 |
| 107.-113. New York Military Academy | Co-Ed | 7-12 | 1889 |
| 107.-113. Ridley College | Co-Ed | Pre-K-12, PG | 1889 |
| 107.-113. St. Catherine's Academy | All-Boys | 4-8 | 1889 |
| 107.-113. The Thacher School | Co-Ed | 9-12 | 1889 |
| 107.-113. Woodberry Forest School | All-Boys | 9-12 | 1889 |
| 114.-117. Choate Rosemary Hall | Co-Ed | 9-12, PG | 1890 |
| 114.-117. The MacDuffie School | Co-Ed | 9-12, PG | 1890 |
| 114.-117. Scattergood Friends School | Co-Ed | 9-12, PG | 1890 |
| 114.-117. The Taft School | Co-Ed | 9-12, PG | 1890 |
| 118.-120. Ashbury College | Co-Ed | 9-12 | 1891 |
| 118.-120. The Hotchkiss School | Co-Ed | 9-12, PG | 1891 |
| 118.-120. New Mexico Military Institute | Co-Ed | 9-12, PG | 1891 |
| 121.-122. Camden Military Academy | All-Boys | 7-12, PG | 1892 |
| 121.-122. Randolph-Macon Academy | Co-Ed | 6-12, PG | 1892 |
| 123.-127. Baylor School | Co-Ed | 9-12 | 1893 |
| 123.-127. George School | Co-Ed | 9-12 | 1893 |
| 123.-127. Mercersburg Academy | Co-Ed | 9-12, PG | 1893 |
| 123.-127. St. Andrew's School | Co-Ed | 9-12, PG | 1893 |
| 123.-127. TMI -The Episcopal School of Texas | Co-Ed | 8-12 | 1893 |
| 128.-131. Chatham Hall | All-Girls | 9-12 | 1894 |
| 128.-131. Culver Academies | Co-Ed | 9-12 | 1894 |
| 128.-131. Havergal College | All-Girls | 9-12 | 1894 |
| 128.-131. Pomfret School | Co-Ed | 9-12, PG | 1894 |
| 132.-133. Menaul School | Co-Ed | 9-12 | 1896 |
| 132.-133. St. George's School | Co-Ed | 9-12 | 1896 |
| 134.-135. Fork Union Military Academy | All-Boys | 6-12, PG | 1898 |
| 134.-135. Miss Hall's School | All-Girls | 9-12 | 1898 |
| 136.-137. Massanutten Military Academy | Co-Ed | 7-12, PG | 1899 |
| 136.-137. St. Andrew's College | All-Boys | 6-12 | 1899 |
| 138.-140. Asheville School | Co-Ed | 9-12 | 1900 |
| 138.-140. Christ School | All-Boys | 8-12 | 1900 |
| 138.-140. Rumsey Hall School | Co-Ed | 6-9 | 1900 |
| 141.-143. Hillside School | All-Boys | 5-9 | 1901 |
| 141.-143. Middlesex School | Co-Ed | 9-12 | 1901 |
| 141.-143. Salisbury School | All-Boys | 9-12, PG | 1901 |
| 144. Robinson School | Co-Ed | 7-12 | 1902 |
| 145. Rabun Gap-Nacoochee School | Co-Ed | 7-12 | 1903 |
| 146. The Knox School | Co-Ed | 7-12, PG | 1904 |
| 147.-149. Darlington School | Co-Ed | 9-12, PG | 1905 |
| 147.-149. McCallie School | All-Boys | 9-12 | 1905 |
| 147.-149. Northwood School | Co-Ed | 9-12, PG | 1905 |
| 150.-153. Archbishop Riordan High School | All-Boys | 9-12 | 1906 |
| 150.-153. Kent School | Co-Ed | 9-12, PG | 1906 |
| 150.-153. The Madeira School | All-Girls | 9-12 | 1906 |
| 150.-153. St. Michaels University School | Co-Ed | 8-12 | 1906 |
| 154.-157. Berkshire School | Co-Ed | 9-12, PG | 1907 |
| 154.-157. Riverside Military Academy | All-Boys | 7-12 | 1907 |
| 154.-157. San Marcos Baptist Academy | Co-Ed | 7-12 | 1907 |
| 154.-157. Trinity Pawling School | All-Boys | 9-12, PG | 1907 |
| 158. St. Margaret's School | All-Girls | 7-12 | 1908 |
| 159.-163. Blue Ridge School | All-Boys | 9-12 | 1909 |
| 159.-163. Hargrave Military Academy | All-Boys | 7-12, PG | 1909 |
| 159.-163. St. Albans School | All-Boys | 9-12 | 1909 |
| 159.-163. Tallulah Falls School | Co-Ed | 7-12 | 1909 |
| 159.-163. Westover School | All-Girls | 9-12 | 1909 |
| 164.-169. Andrews Osborne Academy | Co-Ed | 7-12 | 1910 |
| 164.-169. Army and Navy Academy | All-Boys | 7-12 | 1910 |
| 164.-169. Cate School | Co-Ed | 9-12 | 1910 |
| 164.-169. Garrison Forest School | All-Girls | 8-12 | 1910 |
| 164.-169. St. Anne's-Belfield School | Co-Ed | 9-12 | 1910 |
| 164.-169. Wolfeboro: The Summer Boarding School | Co-Ed | 6-12, PG | 1910 |
| 170.-172. Cotter Schools | Co-Ed | 9-12, PG | 1911 |
| 170.-172. The Ethel Walker School | All-Girls | 9-12, PG | 1911 |
| 170.-172. Ojai Valley School | Co-Ed | 3-12 | 1911 |
| 173. Montverde Academy | Co-Ed | 7-12, PG | 1912 |
| 174. The Hockaday School | All-Girls | 8-12 | 1913 |
| 175.-176. Foxcroft School | All-Girls | 9-12, PG | 1914 |
| 175.-176. The Hun School of Princeton | Co-Ed | 9-12, PG | 1914 |
| 177. Canterbury School | Co-Ed | 9-12, PG | 1915 |
| 178.-179. Shawnigan Lake School | Co-Ed | 8-12 | 1916 |
| 178.-179. Virginia Episcopal School | Co-Ed | 9-12 | 1916 |
| 180. CFS, The School at Church Farm | All-Boys | 7-12 | 1918 |
| 181. The Rectory School | Co-Ed | 5-9 | 1920 |
| 182.-184. Christchurch School | Co-Ed | 9-12 | 1921 |
| 182.-184. Oakdale Christian Academy | Co-Ed | 7-12 | 1921 |
| 182.-184. St. Margaret's School | All-Girls | 8-12 | 1921 |
| 185.-189. Concord Academy | Co-Ed | 9-12 | 1922 |
| 185.-189. Cranbrook Schools | Co-Ed | 9-12 | 1922 |
| 185.-189. Eaglebrook School | All-Boys | 6-9 | 1922 |
| 185.-189. The Stony Brook School | Co-Ed | 7-12 | 1922 |
| 185.-189. The Webb Schools | Co-Ed | 9-12 | 1922 |
| 190.-191. Brentwood College School | Co-Ed | 9-12, PG | 1923 |
| 190.-191. South Kent School | All-Boys | 9-12, PG | 1923 |
| 192.-193. Southwestern Academy | Co-Ed | 6-12, PG | 1924 |
| 192.-193. Villanova Preparatory School | Co-Ed | 9-12 | 1924 |
| 194.-195. Bement School | Co-Ed | 3-9 | 1925 |
| 194.-195. Solebury School | Co-Ed | 9-12 | 1925 |
| 196.-201. Brooks School | Co-Ed | 9-12 | 1926 |
| 196.-201. The Gow School | All-Boys | 7-12, PG | 1926 |
| 196.-201. Mercyhurst Preparatory School | Co-Ed | 9-12 | 1926 |
| 196.-201. Monte Vista Christian School | Co-Ed | 9-12 | 1926 |
| 196.-201. Portsmouth Abbey School | Co-Ed | 9-12 | 1926 |
| 196.-201. The Winchendon School | Co-Ed | 9-12, PG | 1926 |
| 202.-203. Avon Old Farms School | All-Boys | 9-12, PG | 1927 |
| 202.-203. St. Francis High School | All-Boys | 9-12 | 1927 |
| 204.-206. Buxton School | Co-Ed | 9-12 | 1928 |
| 204.-206. Interlochen Arts Academy | Co-Ed | 9-12, PG | 1928 |
| 204.-206. Valley Forge Military Academy | All-Boys | 7-12, PG | 1928 |
| 207.-209. The Leelanau School | Co-Ed | 9-12 | 1929 |
| 207.-209. The Orme School of Arizona | Co-Ed | 8-12, PG | 1929 |
| 207.-209. St. Andrew's School, DE | Co-Ed | 9-12 | 1929 |
| 210.-211. The Forman School | Co-Ed | 9-12, PG | 1930 |
| 210.-211. Fountain Valley School of Colorado | Co-Ed | 9-12 | 1930 |
| 212.-213. Flintridge Sacred Heart Academy | All-Girls | 9-12 | 1931 |
| 212.-213. Millbrook School | Co-Ed | 9-12, PG | 1931 |
| 214.-215. Darrow School | Co-Ed | 9-12 | 1932 |
| 214.-215. Midland School | Co-Ed | 9-12 | 1932 |
| 216.-217. Admiral Farragut Academy | Co-Ed | 6-12 | 1933 |
| 216.-217. The Bolles School | Co-Ed | 7-12, PG | 1933 |
| 218. Ecole d’Humanité | Co-Ed | 9-12, PG | 1934 |
| 219.-221. Dublin School | Co-Ed | 9-12 | 1935 |
| 219.-221. Hillcrest Lutheran Academy | Co-Ed | 9-12 | 1935 |
| 219.-221. The Putney School | Co-Ed | 9-12, PG | 1935 |
| 222. North Country School | Co-Ed | 4-9 | 1938 |
| 223. High Mowing School | Co-Ed | 9-12 | 1942 |
| 224. Fenster School | Co-Ed | 9-12, PG | 1944 |
| 225.-226. Cardigan Mountain School | All-Boys | 6-9 | 1945 |
| 225.-226. Western Mennonite School | Co-Ed | 9-12 | 1945 |
| 227.-229. Besant Hill School (Formerly Happy Valley School) | Co-Ed | 9-12 | 1946 |
| 227.-229. The Phelps School | All-Boys | 7-12, PG | 1946 |
| 227.-229. Thomas Jefferson School | Co-Ed | 7-12, PG | 1946 |
| 230.-231. Hampshire Country School | All-Boys | 3-12 | 1948 |
| 230.-231. Verde Valley School | Co-Ed | 9-12 | 1948 |
| 232.-234. Aiglon College | Co-Ed | 4-12 | 1949 |
| 232.-234. Hawai'i Preparatory Academy | Co-Ed | 6-12, PG | 1949 |
| 232.-234. Lustre Christian High School | Co-Ed | 9-12 | 1949 |
| 235.-237. Oakland School | Co-Ed | 9-12 | 1950 |
| 235.-237. St. Stephen's Episcopal School | Co-Ed | 8-12 | 1950 |
| 235.-237. Santa Catalina School | All-Girls | 9-12 | 1950 |
| 238.-239. Indian Springs School | Co-Ed | 8-12 | 1952 |
| 238.-239. Stevenson School | Co-Ed | 9-12 | 1952 |
| 240. Colorado Rocky Mountain School | Co-Ed | 9-12, PG | 1953 |
| 241. Rancho Solano Preparatory School | Co-Ed | 9-12 | 1954 |
| 242. The Marvelwood School | Co-Ed | 9-12, PG | 1956 |
| 243.-245. Dunn School | Co-Ed | 9-12 | 1957 |
| 243.-245. North Broward Preparatory School | Co-Ed | 6-12 | 1957 |
| 243.-245. Woodside Priory School (Priory) | Co-Ed | 9-12 | 1957 |
| 246. St. Croix Schools | Co-Ed | 6-12 | 1958 |
| 247. Brandon Hall School | Co-Ed | 6-12, PG | 1959 |
| 248.-252. Florida Air Academy | Co-Ed | 6-12 | 1961 |
| 248.-252. Leysin American School in Switzerland (LAS) | Co-Ed | 8-12, PG | 1961 |
| 248.-252. Linden Hill School | All-Boys | 8-9 | 1961 |
| 248.-252. Saint Andrew's School | Co-Ed | 9-12 | 1961 |
| 248.-252. Sandy Spring Fiends School | Co-Ed | 9-12 | 1961 |
| 253. St. Thomas More School | All-Boys | 8-12, PG | 1962 |
| 254.-256. La Lumiere School | Co-Ed | 9-12, PG | 1963 |
| 254.-256. Marine Military Academy | All-Boys | 8-12, PG | 1963 |
| 254.-256. Purnell School | All-Girls | 9-12 | 1963 |
| 257. St. Stephen's School | Co-Ed | 9-12, PG | 1964 |
| 258. The Athenian School | Co-Ed | 9-12 | 1965 |
| 259.-260. Hyde School - Bath, ME | Co-Ed | 9-12, PG | 1966 |
| 259.-260. The Village School | Co-Ed | 9-12 | 1966 |
| 261.-262. Eagle Hill School | Co-Ed | 8-12 | 1967 |
| 261.-262. Rosseau Lake College | Co-Ed | 7-12, PG | 1967 |
| 263. The Kildonan School | Co-Ed | 7-12, PG | 1969 |
| 264. Mount Michael Benedictine School | All-Boys | 9-12 | 1970 |
| 265.-266. Landmark School | Co-Ed | 9-12 | 1971 |
| 265.-266. UWC South East Asia East | Co-Ed | 7-12 | 1971 |
| 267.-268. Maharishi School | Co-Ed | 9-12 | 1972 |
| 267.-268. Oak Creek Ranch School | Co-Ed | 7-12, PG | 1972 |
| 269. Erie First Christian Academy | Co-Ed | 8-12, PG | 1973 |
| 270.-272. Colorado Timberline Academy | Co-Ed | 9-12, PG | 1975 |
| 270.-272. Happy Hill Farm Academy | Co-Ed | K-12 | 1975 |
| 270.-272. Oak Grove School | Co-Ed | 7-12 | 1975 |
| 273.-274. Delphian School | Co-Ed | 3-12 | 1976 |
| 273.-274. TASIS The American School in England | Co-Ed | 9-12, PG | 1976 |
| 275.-277. The Greenwood School | All-Boys | 6-12 | 1978 |
| 275.-277. Robert Land Academy | All-Boys | 6-12 | 1978 |
| 275.-277. Squaw Valley Academy | Co-Ed | 9-12 | 1978 |
| 278. Columbia International College | Co-Ed | 7-12, PG | 1979 |
| 279. Venta Preparatory School | Co-Ed | K-10 | 1981 |
| 280.-281. Brehm Preparatory School | Co-Ed | 6-12, PG | 1982 |
| 280.-281. Ekklesia Mountain High | Co-Ed | 9-12 | 1982 |
| 282.-283. Excelsior School | Co-Ed | 9-12 | 1986 |
| 282.-283. Idyllwild Arts Academy | Co-Ed | 9-12, PG | 1986 |
| 284.-285. Bronte College of Canada | Co-Ed | 9-12 | 1991 |
| 284.-285. Ross School | Co-Ed | 7-12, PG | 1991 |
| 286. Saddlebrook Preparatory School | Co-Ed | 7-12, PG | 1992 |
| 287.-288. Advanced Academy of Georgia | Co-Ed | 11-12 | 1995 |
| 287.-288. CCI The Renaissance School | Co-Ed | 10-12, PG | 1995 |
| 289. Hyde School - Woodstock, CT | Co-Ed | 9-12, PG | 1996 |
| 290. The Brook Hill School | Co-Ed | 8-12 | 1997 |
| 291.-293. Bachman Academy | Co-Ed | 6-12, PG | 1999 |
| 291.-293. Lake Mary Preparatory School | Co-Ed | 9-12 | 1999 |
| 291.-293. St. Andrew's Academy | Co-Ed | 6-12 | 1999 |
| 294.-295. Country Day School, Costa Rica | Co-Ed | 8-12 | 2000 |
| 294.-295. Windermere Preparatory School | Co-Ed | 9-12 | 2000 |
| 296. Valley International Academy | Co-Ed | 9-12, PG | 2001 |
| 297. Carlbrook School | Co-Ed | 9-12, PG | 2002 |
| 298. Oliverian School | Co-Ed | 9-12, PG | 2003 |
| 299.-300. EF International Academy | Co-Ed | 9-12 | 2005 |
| 299.-300. Leman Manhattan | Co-Ed | 9-12 | 2005 |
| 301. Donahue Academy of Ave Maria | Co-Ed | 9-12 | 2007 |
| 302.-303. Middlebridge School | Co-Ed | 7-12, PG | 2008 |
| 302.-303. THINK Global School | Co-Ed | 9-12 | 2008 |
| 304. SPIRE Institute | Co-Ed | 9-12, PG | 2011 |
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