| Total | 28,996 | 5,057,520 | 479,775 |
| | | | |
| None | 6,768 | 535,422 | 58,466 |
| | | | |
| Religious | | | |
| Accelerated Christian Education | 1,439 | 58,436 | 7,685 |
| American Association of Christian Schools | 891 | 125,286 | 12,264 |
| Association of Christian Schools International | 3,627 | 665,608 | 62,778 |
| Association of Christian Teachers and Schools | 243 | 36,919 | 3,440 |
| Association of Classical and Christian Schools | 161 | 23,041 | 2,663 |
| | | | |
| Christian Schools International | 383 | 89,663 | 7,791 |
| Evangelical Lutheran Education Association | 236 | 31,235 | 2,829 |
| Friends Council on Education | 62 | 16,017 | 2,067 |
| General Conference of the Seventh-Day Adventist Church | 708 | 45,927 | 3,942 |
| Islamic School League of America | 90 | 11,995 | 1,542 |
| | | | |
| Jesuit Secondary Education Association | 52 | 46,501 | 3,421 |
| National Association of Episcopal Schools | 277 | 90,929 | 11,108 |
| National Catholic Educational Association | 6,789 | 2,052,782 | 144,928 |
| National Christian School Association | 160 | 36,661 | 3,181 |
| National Society of Hebrew Day Schools | 293 | 85,281 | 11,547 |
| | | | |
| Oral Roberts University Educational Fellowship | 99 | 21,957 | 2,096 |
| Solomon Schechter Day Schools | 61 | 14,601 | 2,140 |
| Southern Baptist Association of Christian Schools | 154 | 29,036 | 2,844 |
| Other religious school associations | 2,571 | 476,110 | 45,878 |
| | | | |
| Special emphasis | | | |
| American Montessori Society | 751 | 60,287 | 8,707 |
| Association Montessori International | 494 | 29,428 | 3,080 |
| Other Montessori associations | 576 | 37,146 | 5,201 |
| Association of Military Colleges and Schools | 22 | 4,786 | 589 |
| Association of Waldorf Schools of North America | 114 | 16,457 | 2,462 |
| | | | |
| Bilingual School Association | 19 | 4,212 | 368 |
| Council of Bilingual Education | ‡ | ‡ | ‡ |
| Council for Exceptional Children | 397 | 41,461 | 6,461 |
| National Association of Private Schools for Exceptional Children | 349 | 34,976 | 5,139 |
| Other associations for exceptional children | 353 | 38,554 | 5,563 |
| | | | |
| European Council for International Schools | 18 | 7,127 | 920 |
| National Association for the Education of Young Children | 932 | 142,579 | 14,104 |
| National Association of Bilingual Education | ‡ | ‡ | ‡ |
| National Association of Laboratory Schools | ‡ | ‡ | ‡ |
| National Coalition of Girls' Schools | 88 | 34,024 | 4,730 |
| Other special emphasis school associations | 1,175 | 215,683 | 22,577 |
| | | | |
| Other school associations or organizations | | | |
| Alternative School Network | 35 | 2,507 | 246 |
| Institute for Independent Education | 73 | 11,231 | 1,270 |
| National Association of Independent Schools | 1,126 | 489,367 | 64,540 |
| State or regional independent school association | 2,127 | 672,443 | 76,788 |
| National Coalition of Alternative Community Schools | 51 | 3,876 | 568 |
| National Independent Private School Association | 302 | 54,438 | 6,010 |
| The Association of Boarding Schools | 212 | 64,733 | 10,039 |
| Other school associations | 2,411 | 603,411 | 57,217 |
| ‡ Reporting standards not met. |
| NOTE: Detail may not sum to totals because of rounding or missing values in cells with too few sample cases. Private schools may belong to more than one association. These estimates do not include private schools for which kindergarten is the highest grade. |
| SOURCE: U.S. Department of Education, National Center for Education Statistics, Private School Universe Survey (PSS), 2005–2006. |