| Index | Greenfield | Tennessee | National |
| Average Test Scores | 41% | 35% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 1 | 1,390 | 79,221 |
| Total private schools | n/a | 430 | 24,874 |
| Total post-secondary schools | n/a | 189 | 7,963 |
| Index | Greenfield | Tennessee | National |
| Completed 8th grade | 69.8% | 82.0% | 84.3% |
| Completed high school | 65.6% | 79.9% | 83.0% |
| Completed some college | 39.4% | 53.2% | 59.4% |
| Completed associate degree | 21.9% | 32.2% | 38.5% |
| Completed bachelors | 16.8% | 25.4% | 30.3% |
| Completed masters | 5.9% | 9.3% | 11.5% |
| Completed professional degree | 0.7% | 2.8% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Greenfield. Using the proficiency score averages, the average test scores for Greenfield, TN schools is 41%. The average student to teacher ratio is n/a. In Greenfield, TN, an average of 69.8% of students have completed 8th grade and an average of 65.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Rutherford, TN | 1,076 | 47% | 2.1% |
| Bradford, TN | 1,201 | 42% | 12.5% |
| Martin, TN | 10,585 | 41% | 14.9% |
| Kenton, TN | 1,438 | 40% | 16.7% |
| Sharon, TN | 1,127 | 40% | 17.7% |
| Greenfield, TN | 2,348 | 41% | 15.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Gold Beach, OR | 2,348 | 49% | 1.0% |
| Enfield, NC | 2,348 | 24% | 50.0% |
| Salmon Brook, CT | 2,348 | 71% | 47.4% |
| Athens, IL | 2,349 | 37% | 22.9% |
| Helper, UT | 2,346 | 40% | 17.7% |
| Greenfield, TN | 2,348 | 41% | 15.6% |
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