| Index | Custer | South Dakota | National |
| Average Test Scores | 50% | 48% | 48% |
| Student/Teacher ratio | 12:1 | 14:1 | 16:1 |
| Total public schools | 6 | 340 | 79,221 |
| Total private schools | n/a | 76 | 24,874 |
| Total post-secondary schools | n/a | 25 | 7,963 |
Why stop at city-to-city? With Local Insights, you can compare neighborhoods, zip codes, or even exact addresses. Access 300+ hyperlocal data points—from schools and crime to housing and amenities—to see which area is the better fit.
| Index | Custer | South Dakota | National |
| Completed 8th grade | 89.6% | 89.1% | 84.3% |
| Completed high school | 86.1% | 86.8% | 83.0% |
| Completed some college | 59.5% | 60.4% | 59.4% |
| Completed associate degree | 33.6% | 38.5% | 38.5% |
| Completed bachelors | 22.9% | 27.5% | 30.3% |
| Completed masters | 4.2% | 8.1% | 11.5% |
| Completed professional degree | 0.9% | 2.5% | 3.3% |
| Completed doctorate | 0.8% | 1.2% | 1.3% |
There are a total of 6 public schools, n/a private schools and n/a post-secondary schools in Custer. Using the proficiency score averages, the average test scores for Custer, SD schools is 50%. The average student to teacher ratio is 12:1. In Custer, SD, an average of 89.6% of students have completed 8th grade and an average of 86.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Hill City, SD | 601 | 62% | 29.5% |
| Custer, SD | 2,402 | 50% | 3.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Brewster, WA | 2,402 | 41% | 14.9% |
| Somers, CT | 2,403 | 60% | 25.3% |
| Salmon Brook, CT | 2,401 | 71% | 47.4% |
| Woodbine, NJ | 2,403 | 35% | 28.1% |
| Silver Creek, NY | 2,403 | 57% | 18.1% |
| Custer, SD | 2,402 | 50% | 3.1% |
Here are the best places to live in South Dakota
These are the largest cities in South Dakota
Check out the 10 safest cities in South Dakota
See the best places to live in Custer