| Index | Costilla | New Mexico | National |
| Average Test Scores | 40% | 27% | 48% |
| Student/Teacher ratio | n/a | 15:1 | 16:1 |
| Total public schools | n/a | 667 | 79,221 |
| Total private schools | n/a | 163 | 24,874 |
| Total post-secondary schools | n/a | 55 | 7,963 |
| Index | Costilla | New Mexico | National |
| Completed 8th grade | 45.5% | 81.4% | 84.3% |
| Completed high school | 45.5% | 80.0% | 83.0% |
| Completed some college | 45.5% | 58.2% | 59.4% |
| Completed associate degree | 45.5% | 34.7% | 38.5% |
| Completed bachelors | 45.5% | 26.7% | 30.3% |
| Completed masters | 0.0% | 11.6% | 11.5% |
| Completed professional degree | 0.0% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.8% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Costilla. Using the proficiency score averages, the average test scores for Costilla, NM schools is 40%. The average student to teacher ratio is n/a. In Costilla, NM, an average of 45.5% of students have completed 8th grade and an average of 45.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Costilla, NM | 89 | 40% | 16.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Lund, NV | 89 | 25% | 48.4% |
| Chuathbaluk, AK | 89 | 50% | 4.2% |
| Powhattan, KS | 89 | 20% | 58.3% |
| Antimony, UT | 89 | 50% | 4.2% |
| Fort Ransom, ND | 89 | 50% | 4.2% |
| Costilla, NM | 89 | 40% | 16.7% |
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