| Index | Yarnell | Arizona | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 1,863 | 79,221 |
| Total private schools | n/a | 316 | 24,874 |
| Total post-secondary schools | n/a | 148 | 7,963 |
| Index | Yarnell | Arizona | National |
| Completed 8th grade | 86.5% | 83.7% | 84.3% |
| Completed high school | 85.2% | 82.2% | 83.0% |
| Completed some college | 53.7% | 62.0% | 59.4% |
| Completed associate degree | 31.1% | 36.5% | 38.5% |
| Completed bachelors | 14.6% | 28.0% | 30.3% |
| Completed masters | 3.7% | 10.4% | 11.5% |
| Completed professional degree | 0.0% | 2.9% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Yarnell. Using the proficiency score averages, the average test scores for Yarnell, AZ schools is n/a. The average student to teacher ratio is n/a. In Yarnell, AZ, an average of 86.5% of students have completed 8th grade and an average of 85.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Congress, AZ | 1,846 | 60% | 24.0% |
| Peeples Valley, AZ | 566 | 25% | 47.9% |
| Yarnell, AZ | 667 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Loa, UT | 667 | 42% | 12.5% |
| Cowley, WY | 667 | 50% | 4.2% |
| Paris, ID | 667 | 52% | 8.3% |
| Waynesfield, OH | 668 | 73% | 52.6% |
| Mount Victory, OH | 666 | 58% | 21.4% |
| Yarnell, AZ | 667 | n/a |
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