This was 21.3 percent lower than the state average of 47.4 percent. In 2020 the total municipality population reached 1,585.
83.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Middletown for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 172 | 16.7 |
| Regular high school diploma | 269 | 26.1 |
| GED or alternative credential | 67 | 6.5 |
| Some college, less than 1 year | 98 | 9.5 |
| Some college, 1 or more years, no degree | 154 | 15 |
| Associate's degree | 68 | 6.6 |
| Bachelor's degree | 166 | 16.1 |
| Master's degree | 26 | 2.5 |
| Professional school degree | 6 | 0.6 |
| Doctorate degree | 3 | 0.3 |
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