| Index | Mullen | Nebraska | National |
| Average Test Scores | 73% | 53% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 780 | 79,221 |
| Total private schools | n/a | 182 | 24,874 |
| Total post-secondary schools | n/a | 56 | 7,963 |
| Index | Mullen | Nebraska | National |
| Completed 8th grade | 90.0% | 88.4% | 84.3% |
| Completed high school | 89.3% | 87.2% | 83.0% |
| Completed some college | 61.4% | 63.7% | 59.4% |
| Completed associate degree | 39.5% | 40.1% | 38.5% |
| Completed bachelors | 24.8% | 30.0% | 30.3% |
| Completed masters | 8.8% | 9.9% | 11.5% |
| Completed professional degree | 0.0% | 2.9% | 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 Mullen. Using the proficiency score averages, the average test scores for Mullen, NE schools is 73%. The average student to teacher ratio is n/a. In Mullen, NE, an average of 90.0% of students have completed 8th grade and an average of 89.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Mullen, NE | 457 | 73% | 51.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Almena, KS | 457 | 45% | 6.3% |
| Effingham, KS | 457 | 26% | 45.8% |
| Madison, NY | 457 | 33% | 32.3% |
| Tower, MN | 457 | 58% | 19.8% |
| Murray, NE | 458 | 57% | 18.8% |
| Mullen, NE | 457 | 73% | 51.0% |
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