This was 8.3 percent higher than the state average of 41.8 percent. In 2020 the total municipality population reached 2,682.
95.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Belleville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 75 | 4.3 |
| Regular high school diploma | 348 | 20.2 |
| GED or alternative credential | 53 | 3.1 |
| Some college, less than 1 year | 175 | 10.1 |
| Some college, 1 or more years, no degree | 211 | 12.2 |
| Associate's degree | 240 | 13.9 |
| Bachelor's degree | 460 | 26.6 |
| Master's degree | 119 | 6.9 |
| Professional school degree | 26 | 1.5 |
| Doctorate degree | 20 | 1.2 |
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