| Index | Pen Mar | Pennsylvania | National |
| Average Test Scores | n/a | 55% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 2,563 | 79,221 |
| Total private schools | n/a | 1,626 | 24,874 |
| Total post-secondary schools | n/a | 406 | 7,963 |
| Index | Pen Mar | Pennsylvania | National |
| Completed 8th grade | 92.9% | 86.9% | 84.3% |
| Completed high school | 92.0% | 85.6% | 83.0% |
| Completed some college | 54.2% | 53.6% | 59.4% |
| Completed associate degree | 40.6% | 37.4% | 38.5% |
| Completed bachelors | 23.3% | 29.3% | 30.3% |
| Completed masters | 7.8% | 11.5% | 11.5% |
| Completed professional degree | 2.0% | 3.3% | 3.3% |
| Completed doctorate | 1.3% | 1.4% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Pen Mar. Using the proficiency score averages, the average test scores for Pen Mar, PA schools is n/a. The average student to teacher ratio is n/a. In Pen Mar, PA, an average of 92.9% of students have completed 8th grade and an average of 92.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Greencastle, PA | 4,008 | 69% | 44.4% |
| Sabillasville, MD | 390 | 65% | 35.4% |
| Fayetteville, PA | 2,855 | 64% | 32.3% |
| Cashtown, PA | 244 | 63% | 31.3% |
| Biglerville, PA | 1,261 | 63% | 30.9% |
| Pen Mar, PA | 1,185 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Ashton, ID | 1,185 | 43% | 9.9% |
| Eclectic, AL | 1,184 | 52% | 8.3% |
| Sand Point, AK | 1,186 | 40% | 17.7% |
| Lannon, WI | 1,184 | 75% | 55.2% |
| Harvard, NE | 1,184 | 42% | 13.5% |
| Pen Mar, PA | 1,185 | n/a |
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