| Total | 11.1 | | 12.1 | | 11.9 | | 9.6 | |
| | | | | | | | | |
| Private school typology | | | | | | | | |
| Catholic | 14.7 | | 15.3 | | 14.0 | | 11.3 | |
| Parochial | 15.5 | | 15.8 | | 13.3 | | 12.5 | |
| Diocesan | 14.9 | | 15.3 | | 14.5 | | 11.8 | |
| Private | 12.7 | | 11.5 | | 13.7 | | 10.7 | |
| | | | | | | | | |
| Other religious | 10.5 | | 10.7 | | 9.9 | | 10.5 | |
| Conservative Christian | 11.3 | | 11.3 | | 12.3 | | 11.2 | |
| Other affiliated | 10.0 | | 10.1 | | 9.4 | | 10.1 | |
| Unaffiliated | 10.1 | | 10.6 | | 9.4 | | 9.8 | |
| | | | | | | | | |
| Nonsectarian | 7.8 | | 7.6 | | 7.5 | | 8.0 | |
| Regular | 8.4 | | 8.2 | | 7.7 | | 8.7 | |
| Special emphasis | 7.6 | | 7.0 | | 8.5 | | 8.9 | |
| Special education | 5.6 | | 5.5 | | 5.6 | | 5.6 | |
| | | | | | | | | |
| Program emphasis | | | | | | | | |
| Regular elementary/secondary | 11.8 | | 13.2 | | 12.4 | | 10.1 | |
| Montessori | 6.8 | | 6.4 | | ‡ | | 10.2 | |
| Special program emphasis | 8.7 | | 8.6 | | 8.2 | | 8.9 | |
| Special education | 5.6 | | 5.3 | | 5.6 | | 5.6 | |
| Vocational/technical | ‡ | | ‡ | | ‡ | | ‡ | |
| Alternative | 9.0 | | 7.6 | | 9.9 | | 9.0 | |
| Early childhood | 6.6 | | 6.5 | | † | | 12.7 | ! |
| | | | | | | | | |
| Size (number of students) | | | | | | | | |
| Less than 50 | 6.1 | | 6.5 | | 5.0 | | 5.5 | |
| 50–149 | 8.9 | | 9.8 | | 8.1 | | 7.6 | |
| 150–299 | 12.0 | | 13.5 | | 9.9 | | 9.7 | |
| 300–499 | 12.7 | | 14.7 | | 11.2 | | 10.4 | |
| 500–749 | 12.9 | | 16.4 | | 13.3 | | 10.7 | |
| 750 or more | 12.6 | | 15.8 | | 15.1 | | 11.1 | |
| | | | | | | | | |
| Region | | | | | | | | |
| Northeast | 10.3 | | 11.9 | | 10.9 | | 7.9 | |
| Midwest | 12.6 | | 13.4 | | 13.4 | | 10.2 | |
| South | 10.5 | | 10.9 | | 11.7 | | 10.0 | |
| West | 11.8 | | 12.5 | | 12.4 | | 10.6 | |
| | | | | | | | | |
| Urbanicity type | | | | | | | | |
| City | 11.5 | | 12.3 | | 12.7 | | 9.8 | |
| Suburban | 11.2 | | 12.3 | | 12.2 | | 9.5 | |
| Town | 10.8 | | 11.7 | | 10.4 | | 9.7 | |
| Rural | 10.0 | | 11.1 | | 9.2 | | 9.5 | |
| † Not applicable. |
| ! Interpret data with caution. The coefficient of variation for this estimate is larger than 25 percent. |
| ‡ Reporting standards not met. |
| NOTE: These estimates include schools for which kindergarten is the highest grade (kindergarten-terminal schools) as well as those that provide instruction for one or more of grades 1 through 12 (or comparable ungraded levels). |
| SOURCE: U.S. Department of Education, National Center for Education Statistics, Private School Universe Survey (PSS), 2007–08. |