| Index | Marlborough | New Hampshire | National |
| Average Test Scores | 32% | 52% | 48% |
| Student/Teacher ratio | 11:1 | 13:1 | 16:1 |
| Total public schools | 1 | 234 | 79,221 |
| Total private schools | n/a | 144 | 24,874 |
| Total post-secondary schools | n/a | 40 | 7,963 |
| Index | Marlborough | New Hampshire | National |
| Completed 8th grade | 91.7% | 89.5% | 84.3% |
| Completed high school | 90.8% | 88.4% | 83.0% |
| Completed some college | 48.7% | 64.2% | 59.4% |
| Completed associate degree | 31.3% | 45.3% | 38.5% |
| Completed bachelors | 20.9% | 35.5% | 30.3% |
| Completed masters | 5.3% | 13.4% | 11.5% |
| Completed professional degree | 1.7% | 3.3% | 3.3% |
| Completed doctorate | 1.1% | 1.4% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Marlborough. Using the proficiency score averages, the average test scores for Marlborough, NH schools is 32%. The average student to teacher ratio is 11:1. In Marlborough, NH, an average of 91.7% of students have completed 8th grade and an average of 90.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Walpole, NH | 647 | 60% | 24.0% |
| Northfield, MA | 970 | 55% | 13.5% |
| Jaffrey, NH | 2,750 | 50% | 3.1% |
| Peterborough, NH | 2,704 | 49% | 2.4% |
| Keene, NH | 22,823 | 46% | 4.2% |
| Marlborough, NH | 1,093 | 32% | 33.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Gales Ferry, CT | 1,093 | 52% | 7.3% |
| Bronson, FL | 1,093 | 46% | 4.7% |
| Hector, MN | 1,093 | 50% | 3.1% |
| Monticello, WI | 1,094 | 37% | 22.6% |
| Mendon, IL | 1,092 | 23% | 52.8% |
| Marlborough, NH | 1,093 | 32% | 33.3% |
Here are the best places to live in New Hampshire
These are the largest cities in New Hampshire
Safest Cities In The US
These are the 10 cheapest cities in New Hampshire