| Index | Garden City | Colorado | National |
| Average Test Scores | n/a | 39% | 48% |
| Student/Teacher ratio | n/a | 17:1 | 16:1 |
| Total public schools | n/a | 1,426 | 79,221 |
| Total private schools | n/a | 384 | 24,874 |
| Total post-secondary schools | n/a | 138 | 7,963 |

| Index | Garden City | Colorado | National |
| Completed 8th grade | 69.9% | 87.9% | 84.3% |
| Completed high school | 68.2% | 87.1% | 83.0% |
| Completed some college | 32.9% | 69.3% | 59.4% |
| Completed associate degree | 10.4% | 47.1% | 38.5% |
| Completed bachelors | 6.9% | 38.7% | 30.3% |
| Completed masters | 0.0% | 14.3% | 11.5% |
| Completed professional degree | 0.0% | 3.9% | 3.3% |
| Completed doctorate | 0.0% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Garden City. Using the proficiency score averages, the average test scores for Garden City, CO schools is n/a. The average student to teacher ratio is n/a. In Garden City, CO, an average of 69.9% of students have completed 8th grade and an average of 68.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Timnath, CO | 1,964 | 64% | 32.3% |
| Eaton, CO | 5,858 | 51% | 6.9% |
| Windsor, CO | 24,324 | 50% | 4.8% |
| Severance, CO | 5,738 | 46% | 4.2% |
| Kersey, CO | 1,932 | 41% | 13.9% |
| Garden City, CO | 214 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Karns City, PA | 213 | 64% | 33.3% |
| Okabena, MN | 215 | 35% | 27.1% |
| Winona, KS | 215 | 50% | 4.2% |
| Marietta, MS | 213 | 72% | 50.0% |
| White Shield, ND | 215 | 25% | 48.6% |
| Garden City, CO | 214 | n/a |