Maryland 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 63.3%.
| # | County | State | Diversity index |
|---|---|---|---|
| 1 | Howard County | MD | 76.8% |
| 2 | Montgomery County | MD | 75.0% |
| 3 | Baltimore County | MD | 71.8% |
| 4 | Wicomico County | MD | 70.0% |
| 5 | Anne Arundel County | MD | 69.8% |
| 6 | Frederick County | MD | 69.3% |
| 7 | Dorchester County | MD | 67.6% |
| 8 | Somerset County | MD | 65.9% |
| 9 | Talbot County | MD | 65.3% |
| 10 | Washington County | MD | 64.2% |
| 11 | Kent County | MD | 63.6% |
| 12 | Caroline County | MD | 63.3% |
| 13 | Charles County | MD | 61.3% |
| 14 | Harford County | MD | 61.0% |
| 15 | St. Mary's County | MD | 59.6% |
| 16 | Prince George's County | MD | 57.6% |
| 17 | Worcester County | MD | 56.0% |
| 18 | Calvert County | MD | 54.0% |
| 19 | Cecil County | MD | 50.8% |
| 20 | Baltimore city | MD | 46.8% |
| 21 | Queen Anne's County | MD | 44.6% |
| 22 | Carroll County | MD | 39.7% |
| 23 | Allegany County | MD | 27.9% |