| Orange - Educational Attainment | FIPS Code=17040 |
| 1970 | 1980 | 1990 | |
| Per Cent of Individuals Ages 25 and Older without a High School Diploma | 60.81 | 42.30 | 26.30 |
| Per Cent of Individuals Ages 25 and Older with a High School Diploma or Equivalent | 31.42 | 44.80 | 46.50 |
| Per Cent of Individuals Ages 25 and Older with a Bachelor's Degree or Some College | 0.00 | 8.20 | 15.00 |
| Per Cent of Individuals Ages 25 and Older with a Doctorate, Professional or Master's Degree | 7.77 | 4.70 | 12.20 |