| 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 |
| 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 | 13,845 | 32% | 33.5% |
| Soledad, CA | 25,667 | 29% | 40.2% |
| San Lucas, CA | 415 | 25% | 47.9% |
| Gonzales, CA | 8,348 | 25% | 48.7% |
| Greenfield, CA | 17,565 | 24% | 49.8% |
| Greenfield CDP, CA | 4,582 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Ivanhoe, CA | 4,584 | 40% | 17.7% |
| Marseilles, IL | 4,579 | 30% | 38.5% |
| Bridgeport, PA | 4,576 | 40% | 17.7% |
| Haleiwa, HI | 4,589 | 64% | 32.3% |
| Palacios, TX | 4,589 | 48% | 0.3% |
| Greenfield CDP, CA | 4,582 | n/a |
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