This was 2.9 percent lower than the state average of 36 percent. In 2020 the total municipality population reached 34,871.
90.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Merrillville for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 2,332 | 9.7 |
| Regular high school diploma | 7,974 | 33.3 |
| GED or alternative credential | 687 | 2.9 |
| Some college, less than 1 year | 1,677 | 7 |
| Some college, 1 or more years, no degree | 3,384 | 14.1 |
| Associate's degree | 2,027 | 8.5 |
| Bachelor's degree | 3,842 | 16 |
| Master's degree | 1,576 | 6.6 |
| Professional school degree | 244 | 1 |
| Doctorate degree | 238 | 1 |

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