This was 16.8 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 261.
91.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lineville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 18 | 8.7 |
| Regular high school diploma | 97 | 47.1 |
| GED or alternative credential | 12 | 5.8 |
| Some college, less than 1 year | 11 | 5.3 |
| Some college, 1 or more years, no degree | 18 | 8.7 |
| Associate's degree | 16 | 7.8 |
| Bachelor's degree | 26 | 12.6 |
| Master's degree | 8 | 3.9 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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