| Index | Union City | California | National |
| Average Test Scores | 48% | 43% | 48% |
| Student/Teacher ratio | 20:1 | 20:1 | 16:1 |
| Total public schools | 11 | 8,308 | 79,221 |
| Total private schools | 3 | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Union City | California | National |
| Completed 8th grade | 88.2% | 81.1% | 84.3% |
| Completed high school | 87.5% | 79.8% | 83.0% |
| Completed some college | 63.2% | 61.5% | 59.4% |
| Completed associate degree | 42.8% | 39.8% | 38.5% |
| Completed bachelors | 36.2% | 32.0% | 30.3% |
| Completed masters | 11.7% | 11.9% | 11.5% |
| Completed professional degree | 3.1% | 3.9% | 3.3% |
| Completed doctorate | 1.3% | 1.6% | 1.3% |
There are a total of 11 public schools, 3 private schools and n/a post-secondary schools in Union City. Using the proficiency score averages, the average test scores for Union City, CA schools is 48%. The average student to teacher ratio is 20:1. In Union City, CA, an average of 88.2% of students have completed 8th grade and an average of 87.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Sunol, CA | 862 | 85% | 76.0% |
| Palo Alto, CA | 70,212 | 81% | 68.5% |
| Foster City, CA | 34,247 | 78% | 63.3% |
| San Ramon, CA | 83,423 | 78% | 62.9% |
| San Carlos, CA | 30,787 | 78% | 62.4% |
| Union City, CA | 76,617 | 48% | 0.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Rochester Hills, MI | 76,612 | 66% | 37.8% |
| Camden, NJ | 76,587 | 19% | 60.3% |
| Pasco, WA | 76,821 | 34% | 29.5% |
| Cheektowaga, NY | 76,395 | 58% | 21.3% |
| Jacksonville, NC | 76,345 | 37% | 23.6% |
| Union City, CA | 76,617 | 48% | 0.6% |
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