| Tinmouth - Educational Attainment | FIPS Code=21120 |
| 1970 | 1980 | 1990 | |
| Per Cent of Individuals Ages 25 and Older without a High School Diploma | 85.88 | 30.00 | 22.20 |
| Per Cent of Individuals Ages 25 and Older with a High School Diploma or Equivalent | 67.06 | 40.00 | 35.60 |
| Per Cent of Individuals Ages 25 and Older with a Bachelor's Degree or Some College | 14.12 | 11.30 | 19.50 |
| Per Cent of Individuals Ages 25 and Older with a Doctorate, Professional or Master's Degree | 0.00 | 18.70 | 22.60 |