| Index | Harrison | Montana | National |
| Average Test Scores | 53% | 45% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 408 | 79,221 |
| Total private schools | n/a | 77 | 24,874 |
| Total post-secondary schools | n/a | 32 | 7,963 |
| Index | Harrison | Montana | National |
| Completed 8th grade | 93.9% | 89.4% | 84.3% |
| Completed high school | 78.8% | 88.2% | 83.0% |
| Completed some college | 15.6% | 63.1% | 59.4% |
| Completed associate degree | 4.5% | 38.6% | 38.5% |
| Completed bachelors | 0.0% | 29.9% | 30.3% |
| Completed masters | 0.0% | 9.8% | 11.5% |
| Completed professional degree | 0.0% | 3.0% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Harrison. Using the proficiency score averages, the average test scores for Harrison, MT schools is 53%. The average student to teacher ratio is n/a. In Harrison, MT, an average of 93.9% of students have completed 8th grade and an average of 78.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Cardwell, MT | 107 | 50% | 4.2% |
| Whitehall, MT | 1,000 | 49% | 1.7% |
| Willow Creek, MT | 216 | 45% | 6.3% |
| Three Forks, MT | 1,977 | 41% | 13.9% |
| Harrison, MT | 64 | 53% | 11.1% |
| City | Population | Avg. Test Scores | National Avg. |
| McKinnon, WY | 65 | 50% | 4.2% |
| Fancy Gap, VA | 65 | 91% | 89.6% |
| Halsey, NE | 63 | 50% | 4.2% |
| Orrum, NC | 63 | 16% | 66.7% |
| Bluewater Village, NM | 63 | 50% | 4.2% |
| Harrison, MT | 64 | 53% | 11.1% |
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