| Mendon - Educational Attainment | FIPS Code=21050 |
| 1970 | 1980 | 1990 | |
| Per Cent of Individuals Ages 25 and Older without a High School Diploma | 30.83 | 12.30 | 10.30 |
| Per Cent of Individuals Ages 25 and Older with a High School Diploma or Equivalent | 33.42 | 33.60 | 25.10 |
| Per Cent of Individuals Ages 25 and Older with a Bachelor's Degree or Some College | 21.61 | 23.90 | 23.20 |
| Per Cent of Individuals Ages 25 and Older with a Doctorate, Professional or Master's Degree | 14.12 | 30.30 | 41.40 |