| Index | Duncan | Iowa | National |
| Average Test Scores | n/a | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Duncan | Iowa | National |
| Completed 8th grade | 65.6% | 89.2% | 84.3% |
| Completed high school | 65.6% | 87.7% | 83.0% |
| Completed some college | 35.4% | 59.8% | 59.4% |
| Completed associate degree | 35.4% | 38.4% | 38.5% |
| Completed bachelors | 20.8% | 27.2% | 30.3% |
| Completed masters | 0.0% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Duncan. Using the proficiency score averages, the average test scores for Duncan, IA schools is n/a. The average student to teacher ratio is n/a. In Duncan, IA, an average of 65.6% of students have completed 8th grade and an average of 65.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Kanawha, IA | 954 | 80% | 65.6% |
| Garner, IA | 3,060 | 78% | 63.0% |
| Forest City, IA | 4,117 | 75% | 55.9% |
| Ventura, IA | 761 | 74% | 54.2% |
| Britt, IA | 1,761 | 74% | 53.1% |
| Duncan, IA | 102 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Kingvale, CA | 102 | 90% | 87.5% |
| Vance, SC | 102 | 27% | 43.8% |
| Miami, MO | 102 | 40% | 16.7% |
| Hull, GA | 102 | 48% | 1.0% |
| Dora, NM | 102 | 40% | 17.7% |
| Duncan, IA | 102 | n/a |
Here are the best places to live in Iowa
Check out the 10 most dangerous cities in Iowa
Safest States In The US
See the best places to live in Duncan