This was 25 percent lower than the state average of 40.2 percent. In 2020 the total municipality population reached 1,158.
76.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Tunnel Hill for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 193 | 23.3 |
| Regular high school diploma | 296 | 35.8 |
| GED or alternative credential | 58 | 7 |
| Some college, less than 1 year | 44 | 5.3 |
| Some college, 1 or more years, no degree | 110 | 13.3 |
| Associate's degree | 22 | 2.7 |
| Bachelor's degree | 78 | 9.4 |
| Master's degree | 24 | 2.9 |
| Professional school degree | 2 | 0.2 |
| Doctorate degree | 0 | 0 |
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