Massachusetts counties ranked by the diversity index, the chance that two public school students picked at random from the county belong to different racial or ethnic groups. Counties need at least 3 schools and 1,000 students to qualify. The median ranked county is at 59.6%.
| # | County | State | Diversity index |
|---|---|---|---|
| 1 | Middlesex County | MA | 66.0% |
| 2 | Suffolk County | MA | 66.0% |
| 3 | Hampden County | MA | 63.8% |
| 4 | Nantucket County | MA | 63.7% |
| 5 | Worcester County | MA | 61.7% |
| 6 | Norfolk County | MA | 61.1% |
| 7 | Essex County | MA | 60.3% |
| 8 | Bristol County | MA | 59.0% |
| 9 | Dukes County | MA | 55.0% |
| 10 | Plymouth County | MA | 51.2% |
| 11 | Barnstable County | MA | 50.2% |
| 12 | Berkshire County | MA | 46.1% |
| 13 | Hampshire County | MA | 44.7% |
| 14 | Franklin County | MA | 38.3% |