This was 7.5 percent lower than the state average of 31.4 percent. In 2020 the total municipality population reached 20,122.
85.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Sulphur for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 2,006 | 14.6 |
| Regular high school diploma | 4,372 | 31.9 |
| GED or alternative credential | 688 | 5 |
| Some college, less than 1 year | 1,215 | 8.9 |
| Some college, 1 or more years, no degree | 2,153 | 15.7 |
| Associate's degree | 1,188 | 8.7 |
| Bachelor's degree | 1,502 | 11 |
| Master's degree | 496 | 3.6 |
| Professional school degree | 6 | less than 0.1 |
| Doctorate degree | 78 | 0.6 |
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