| Index | Grenville | South Dakota | National |
| Average Test Scores | n/a | 48% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 340 | 79,221 |
| Total private schools | n/a | 76 | 24,874 |
| Total post-secondary schools | n/a | 25 | 7,963 |
| Index | Grenville | South Dakota | National |
| Completed 8th grade | 91.0% | 89.1% | 84.3% |
| Completed high school | 73.1% | 86.8% | 83.0% |
| Completed some college | 44.9% | 60.4% | 59.4% |
| Completed associate degree | 34.6% | 38.5% | 38.5% |
| Completed bachelors | 29.5% | 27.5% | 30.3% |
| Completed masters | 15.4% | 8.1% | 11.5% |
| Completed professional degree | 15.4% | 2.5% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Grenville. Using the proficiency score averages, the average test scores for Grenville, SD schools is n/a. The average student to teacher ratio is n/a. In Grenville, SD, an average of 91.0% of students have completed 8th grade and an average of 73.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Webster, SD | 1,681 | 65% | 34.7% |
| Waubay, SD | 530 | 36% | 24.5% |
| Agency Village, SD | 970 | 4% | 91.7% |
| Grenville, SD | 71 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Twin Hills, AK | 71 | 20% | 58.3% |
| Quemado, TX | 71 | 75% | 56.3% |
| Wikieup, AZ | 71 | 50% | 4.2% |
| Lamont, WA | 71 | 35% | 27.1% |
| Kim, CO | 71 | 45% | 6.3% |
| Grenville, SD | 71 | n/a |
Here are the best places to live in South Dakota
See the best places to live in Grenville
These are the largest cities in South Dakota
Most Dangerous States In The US