| Index | Lanark | Illinois | National |
| Average Test Scores | 47% | 33% | 48% |
| Student/Teacher ratio | 18:1 | 18:1 | 16:1 |
| Total public schools | 2 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Lanark | Illinois | National |
| Completed 8th grade | 87.7% | 86.2% | 84.3% |
| Completed high school | 86.7% | 84.7% | 83.0% |
| Completed some college | 53.4% | 61.8% | 59.4% |
| Completed associate degree | 24.1% | 40.7% | 38.5% |
| Completed bachelors | 17.8% | 32.9% | 30.3% |
| Completed masters | 5.3% | 12.7% | 11.5% |
| Completed professional degree | 1.3% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Lanark. Using the proficiency score averages, the average test scores for Lanark, IL schools is 47%. The average student to teacher ratio is 18:1. In Lanark, IL, an average of 87.7% of students have completed 8th grade and an average of 86.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Chadwick, IL | 529 | 52% | 8.9% |
| Shannon, IL | 745 | 50% | 3.1% |
| Forreston, IL | 1,392 | 41% | 14.6% |
| Pearl City, IL | 831 | 41% | 15.6% |
| Polo, IL | 2,210 | 39% | 19.1% |
| Lanark, IL | 1,453 | 47% | 2.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Silver Lake, KS | 1,453 | 50% | 4.7% |
| Morrice, MI | 1,453 | 35% | 28.1% |
| North Bend, NE | 1,453 | 62% | 29.2% |
| Goodman, MO | 1,454 | 35% | 28.1% |
| Wurtland, KY | 1,452 | 45% | 6.3% |
| Lanark, IL | 1,453 | 47% | 2.1% |
Here are the best places to live in Illinois
See the best places to live in Lanark
Check out the 10 safest cities in Illinois
Most Dangerous Cities In The US