This was 29.5 percent lower than the state average of 48.4 percent. In 2020 the total municipality population reached 486.
95.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Lyle for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 13 | 4.2 |
| Regular high school diploma | 130 | 41.7 |
| GED or alternative credential | 20 | 6.4 |
| Some college, less than 1 year | 30 | 9.6 |
| Some college, 1 or more years, no degree | 60 | 19.2 |
| Associate's degree | 24 | 7.7 |
| Bachelor's degree | 27 | 8.7 |
| Master's degree | 6 | 1.9 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 2 | 0.6 |
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