| Total | 29.7 | | 307,249 | | 98.3 | | 57.6 |
| | | | | | | | |
| NCES typology | | | | | | | |
| Catholic | 16.6 | | 143,361 | | 99.3 | | 81.3 |
| Parochial | 5.0 | | 16,220 | | 99.2 | | 80.1 |
| Diocesan | 18.3 | | 65,508 | | 99.3 | | 79.1 |
| Private | 54.6 | | 61,633 | | 99.4 | | 83.9 |
| | | | | | | | |
| Other religious | 34.4 | | 95,880 | | 98.0 | | 54.6 |
| Conservative Christian | 47.4 | | 40,715 | | 98.1 | | 53.4 |
| Affiliated | 28.9 | | 30,375 | | 98.5 | | 64.6 |
| Unaffiliated | 23.8 | | 24,791 | | 97.2 | | 48.6 |
| | | | | | | | |
| Nonsectarian | 34.2 | | 68,008 | | 96.5 | | 50.5 |
| Regular | 38.5 | | 51,197 | | 98.5 | | 75.2 |
| Special emphasis | 22.4 | | 11,959 | | 94.7 | | 45.7 |
| Special education | 46.7 | | 4,852 | | 82.8 | | 13.7 |
| | | | | | | | |
| School level | | | | | | | |
| Elementary | † | | † | | † | | † |
| Secondary | 89.8 | | 192,616 | | 98.7 | | 65.5 |
| Combined2 | 64.2 | | 114,633 | | 97.6 | | 54.0 |
| | | | | | | | |
| Program emphasis | | | | | | | |
| Regular elementary/secondary | 29.1 | | 279,231 | | 98.8 | | 63.3 |
| Montessori | 1.8 | | 445 | | 98.7 | | 58.4 |
| Special program emphasis | 39.1 | | 14,252 | | 98.6 | | 68.2 |
| Special education | 44.8 | | 5,234 | | 83.0 | | 13.8 |
| Vocational/technical | ‡ | | ‡ | | ‡ | | ‡ |
| Alternative | 50.3 | | 7,862 | | 92.4 | | 31.1 |
| Early childhood | † | | † | | † | | † |
| | | | | | | | |
| Size (number of students) | | | | | | | |
| Less than 50 | 20.7 | | 7,368 | | 89.8 | | 31.3 |
| 50–149 | 28.8 | | 24,117 | | 94.6 | | 45.5 |
| 150–299 | 27.0 | | 42,801 | | 97.5 | | 65.2 |
| 300–499 | 38.0 | | 54,695 | | 99.1 | | 78.0 |
| 500–749 | 58.7 | | 68,675 | | 99.1 | | 84.3 |
| 750 or more | 87.8 | | 109,594 | | 99.1 | | 86.9 |
| | | | | | | | |
| Region | | | | | | | |
| Northeast | 27.3 | | 83,279 | | 98.2 | | 62.3 |
| Midwest | 23.0 | | 67,575 | | 98.9 | | 60.0 |
| South | 36.1 | | 95,001 | | 98.1 | | 57.4 |
| West | 30.4 | | 61,393 | | 97.9 | | 51.1 |
| | | | | | | | |
| Urbanicity type | | | | | | | |
| City | 28.9 | | 138,803 | | 98.5 | | 62.2 |
| Suburban | 27.8 | | 106,271 | | 98.5 | | 59.9 |
| Town | 29.3 | | 16,179 | | 98.1 | | 52.5 |
| Rural | 34.0 | | 45,996 | | 97.2 | | 50.6 |
| † Not applicable. |
| ‡ Reporting standards not met. |
| 1 The 2004–05 graduation rate is the percent of 12th graders enrolled around October 1, 2004 who graduated in 2004–05. |
| 2 Includes the schools that reported 12th grade enrollment for 2004-05, but were elementary in 2005–06 (less than 1 percent). |
| NOTE: Detail may not sum to totals because of rounding or missing values in cells with too few sample cases. 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. |