| Index | Greenfield CDP | California | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
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| Index | Greenfield CDP | California | National |
| Completed 8th grade | 66.9% | 81.1% | 84.3% |
| Completed high school | 61.4% | 79.8% | 83.0% |
| Completed some college | 33.4% | 61.5% | 59.4% |
| Completed associate degree | 9.2% | 39.8% | 38.5% |
| Completed bachelors | 3.2% | 32.0% | 30.3% |
| Completed masters | 1.7% | 11.9% | 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 Greenfield CDP. Using the proficiency score averages, the average test scores for Greenfield CDP, CA schools is n/a. The average student to teacher ratio is n/a. In Greenfield CDP, CA, an average of 66.9% of students have completed 8th grade and an average of 61.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| King City, CA | 14,253 | 32% | 33.5% |
| Soledad, CA | 26,210 | 29% | 40.2% |
| San Lucas, CA | 429 | 25% | 47.9% |
| Gonzales, CA | 8,676 | 25% | 48.7% |
| Greenfield, CA | 18,212 | 24% | 49.8% |
| Greenfield CDP, CA | 4,762 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Tuscola, IL | 4,761 | 32% | 32.6% |
| Buffalo, WY | 4,760 | 59% | 22.6% |
| Bethel Manor, VA | 4,760 | 92% | 90.6% |
| Deale, MD | 4,757 | 57% | 18.8% |
| Flemington, NJ | 4,754 | 68% | 42.2% |
| Greenfield CDP, CA | 4,762 | n/a |
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