This number was 2.4 percent higher than the state average of 45.3 percent. In 2019 the total municipality population reached 1,365.
92.8 percent of the population had at least a high school diploma or the equivalent. The table below shows how many Castleton-on-Hudson village residents who were at least 25 years old in 2019 held each of the listed degrees.
Degree distribution in Castleton-on-Hudson village for 2019*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 70 | 7.2 |
| Regular high school diploma | 252 | 25.9 |
| GED or alternative credential | 31 | 3.2 |
| Some college, less than 1 year | 58 | 6 |
| Some college, 1 or more years, no degree | 98 | 10.1 |
| Associate's degree | 61 | 6.3 |
| Bachelor's degree | 238 | 24.5 |
| Master's degree | 128 | 13.2 |
| Professional school degree | 11 | 1.1 |
| Doctorate degree | 26 | 2.7 |
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