| Addison - Educational Attainment | FIPS Code=1005 |
| 1970 | 1980 | 1990 | |
| Per Cent of Individuals Ages 25 and Older without a High School Diploma | 48.37 | 27.6 | 17.9 |
| Per Cent of Individuals Ages 25 and Older with a High School Diploma or Equivalent | 31.45 | 40.4 | 39.6 |
| Per Cent of Individuals Ages 25 and Older with a Bachelor's Degree or Some College | 15.73 | 17.7 | 25.3 |
| Per Cent of Individuals Ages 25 and Older with a Doctorate, Professional or Master's Degree | 6.23 | 14.4 | 17.2 |