| Troy - Educational Attainment | FIPS Code=19085 |
| 1970 | 1980 | 1990 | |
| Per Cent of Individuals Ages 25 and Older without a High School Diploma | 74.24 | 52.30 | 38.60 |
| Per Cent of Individuals Ages 25 and Older with a High School Diploma or Equivalent | 18.26 | 34.70 | 44.60 |
| Per Cent of Individuals Ages 25 and Older with a Bachelor's Degree or Some College | 4.47 | 6.50 | 9.10 |
| Per Cent of Individuals Ages 25 and Older with a Doctorate, Professional or Master's Degree | 3.02 | 6.50 | 7.70 |