| Index | Gillespie | Illinois | National | 
| Average Test Scores | 32% | 33% | 48% | 
| Student/Teacher ratio | 17:1 | 18:1 | 16:1 | 
| Total public schools | 3 | 3,938 | 79,221 | 
| Total private schools | n/a | 1,438 | 24,874 | 
| Total post-secondary schools | n/a | 306 | 7,963 | 

 
				
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				| Index | Gillespie | Illinois | National | 
| Completed 8th grade | 84.4% | 86.2% | 84.3% | 
| Completed high school | 83.9% | 84.7% | 83.0% | 
| Completed some college | 51.0% | 61.8% | 59.4% | 
| Completed associate degree | 27.8% | 40.7% | 38.5% | 
| Completed bachelors | 16.2% | 32.9% | 30.3% | 
| Completed masters | 5.8% | 12.7% | 11.5% | 
| Completed professional degree | 1.3% | 3.4% | 3.3% | 
| Completed doctorate | 0.5% | 1.2% | 1.3% | 
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Gillespie. Using the proficiency score averages, the average test scores for Gillespie, IL schools is 32%. The average student to teacher ratio is 17:1. In Gillespie, IL, an average of 84.4% of students have completed 8th grade and an average of 83.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. | 
| Worden, IL | 875 | 57% | 18.8% | 
| Carlinville, IL | 5,645 | 45% | 7.0% | 
| Shipman, IL | 616 | 37% | 22.9% | 
| Sorento, IL | 499 | 37% | 22.9% | 
| Mount Olive, IL | 2,052 | 34% | 30.2% | 
| Gillespie, IL | 2,977 | 32% | 32.6% | 
| City | Population | Avg. Test Scores | National Avg. | 
| Woodbury Heights, NJ | 2,977 | 46% | 5.2% | 
| Smithsburg, MD | 2,977 | 55% | 14.6% | 
| Stanton, TX | 2,978 | 41% | 14.2% | 
| Windsor, MO | 2,976 | 28% | 42.2% | 
| Delphi, IN | 2,979 | 50% | 3.5% | 
| Gillespie, IL | 2,977 | 32% | 32.6% |