| Groton - Educational Attainment | FIPS Code=05020 |
| 1970 | 1980 | 1990 | |
| Per Cent of Individuals Ages 25 and Older without a High School Diploma | 43.37 | 36.20 | 24.00 |
| Per Cent of Individuals Ages 25 and Older with a High School Diploma or Equivalent | 44.48 | 43.50 | 53.00 |
| Per Cent of Individuals Ages 25 and Older with a Bachelor's Degree or Some College | 6.08 | 12.30 | 12.10 |
| Per Cent of Individuals Ages 25 and Older with a Doctorate, Professional or Master's Degree | 6.08 | 8.00 | 11.00 |