| Index | Quincy | Illinois | National |
| Average Test Scores | 28% | 33% | 48% |
| Student/Teacher ratio | 16:1 | 18:1 | 16:1 |
| Total public schools | 20 | 3,938 | 79,221 |
| Total private schools | 11 | 1,438 | 24,874 |
| Total post-secondary schools | 5 | 306 | 7,963 |
| Index | Quincy | Illinois | National |
| Completed 8th grade | 87.6% | 86.2% | 84.3% |
| Completed high school | 86.4% | 84.7% | 83.0% |
| Completed some college | 56.2% | 61.8% | 59.4% |
| Completed associate degree | 31.3% | 40.7% | 38.5% |
| Completed bachelors | 23.8% | 32.9% | 30.3% |
| Completed masters | 8.0% | 12.7% | 11.5% |
| Completed professional degree | 1.9% | 3.4% | 3.3% |
| Completed doctorate | 0.9% | 1.2% | 1.3% |
There are a total of 20 public schools, 11 private schools and 5 post-secondary schools in Quincy. Using the proficiency score averages, the average test scores for Quincy, IL schools is 28%. The average student to teacher ratio is 16:1. In Quincy, IL, an average of 87.6% of students have completed 8th grade and an average of 86.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Palmyra, MO | 3,606 | 47% | 1.7% |
| Liberty, IL | 398 | 41% | 15.1% |
| Canton, MO | 2,455 | 40% | 17.7% |
| Payson, IL | 1,398 | 25% | 49.0% |
| Mendon, IL | 1,092 | 23% | 52.8% |
| Quincy, IL | 40,111 | 28% | 41.8% |
| City | Population | Avg. Test Scores | National Avg. |
| San Gabriel, CA | 40,108 | 54% | 13.5% |
| Cape Girardeau, MO | 40,100 | 42% | 11.6% |
| Hollister, CA | 40,100 | 46% | 5.1% |
| Spanish Fork, UT | 40,069 | 45% | 6.5% |
| Holyoke, MA | 40,161 | 21% | 56.8% |
| Quincy, IL | 40,111 | 28% | 41.8% |
Here are the best places to live in Illinois
See the best places to live in & around Quincy
10 Best cities in Illinois for employment
These are the 10 most affordable cities in Illinois