| Index | Carroll | Iowa | National |
| Average Test Scores | 73% | 69% | 48% |
| Student/Teacher ratio | 14:1 | 13:1 | 16:1 |
| Total public schools | 5 | 1,101 | 79,221 |
| Total private schools | 2 | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Carroll | Iowa | National |
| Completed 8th grade | 91.6% | 89.2% | 84.3% |
| Completed high school | 87.8% | 87.7% | 83.0% |
| Completed some college | 55.3% | 59.8% | 59.4% |
| Completed associate degree | 37.7% | 38.4% | 38.5% |
| Completed bachelors | 25.1% | 27.2% | 30.3% |
| Completed masters | 7.7% | 8.7% | 11.5% |
| Completed professional degree | 4.0% | 2.7% | 3.3% |
| Completed doctorate | 2.2% | 1.1% | 1.3% |
There are a total of 5 public schools, 2 private schools and n/a post-secondary schools in Carroll. Using the proficiency score averages, the average test scores for Carroll, IA schools is 73%. The average student to teacher ratio is 14:1. In Carroll, IA, an average of 91.6% of students have completed 8th grade and an average of 87.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lake City, IA | 1,751 | 90% | 86.5% |
| Coon Rapids, IA | 1,244 | 77% | 60.4% |
| Manning, IA | 1,550 | 76% | 57.8% |
| Wall Lake, IA | 759 | 70% | 44.8% |
| Westside, IA | 248 | 69% | 42.7% |
| Carroll, IA | 9,823 | 73% | 51.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Mayfield, KY | 9,823 | 53% | 10.0% |
| Star, ID | 9,819 | 61% | 26.6% |
| St. Augustine Shores, FL | 9,818 | 76% | 57.3% |
| East Rockaway, NY | 9,810 | 58% | 20.8% |
| Cody, WY | 9,810 | 58% | 21.7% |
| Carroll, IA | 9,823 | 73% | 51.7% |
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