This was 16.8 percent lower than the state average of 47.4 percent. In 2020 the total municipality population reached 94,961.
89.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Portsmouth for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 6,816 | 10.7 |
| Regular high school diploma | 16,148 | 25.3 |
| GED or alternative credential | 3,375 | 5.3 |
| Some college, less than 1 year | 5,283 | 8.3 |
| Some college, 1 or more years, no degree | 12,650 | 19.8 |
| Associate's degree | 6,267 | 9.8 |
| Bachelor's degree | 8,352 | 13.1 |
| Master's degree | 3,751 | 5.9 |
| Professional school degree | 692 | 1.1 |
| Doctorate degree | 441 | 0.7 |
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