

A focus on "some college, no degree" can improve state college attainment rates. More: Connecticut PDF
| County | Percent w/college degree | Number w/college degree | Total population (ages 25-34) | < 9th grade | 9th-12th grade, no diploma | High school grad/GED | Some college, no degree | Associate's degree | Bachelor's degree | Graduate degree |
| TOTAL | 42.5% | 190,656 | 448,837 | 11,770 | 38,413 | 117,645 | 90,353 | 32,031 | 110,049 | 48,576 |
| Middlesex | 50.2% | 10,243 | 20,387 | 122 | 1,059 | 4,850 | 4,113 | 1,537 | 6,114 | 2,592 |
| Fairfield | 49.7% | 58,005 | 116,709 | 4,903 | 9,559 | 24,720 | 19,522 | 7,568 | 34,496 | 15,941 |
| Tolland | 45.7% | 7,970 | 17,450 | 142 | 1,140 | 4,432 | 3,766 | 1,529 | 4,387 | 2,054 |
| Hartford | 40.7% | 45,597 | 111,987 | 2,589 | 10,850 | 30,064 | 22,887 | 8,230 | 27,224 | 10,143 |
| New Haven | 40.5% | 45,321 | 111,894 | 2,842 | 9,840 | 30,869 | 23,022 | 7,336 | 24,879 | 13,106 |
| Litchfield | 36.8% | 7,793 | 21,190 | 357 | 1,480 | 6,598 | 4,962 | 1,905 | 4,485 | 1,403 |
| New London | 34.2% | 11,957 | 34,929 | 559 | 2,764 | 10,808 | 8,841 | 2,770 | 6,448 | 2,739 |
| Windham | 26.4% | 3,770 | 14,291 | 256 | 1,721 | 5,304 | 3,240 | 1,156 | 2,016 | 598 |