Oregon Gazetteer
The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
| County | Diversity Index | |
|---|---|---|
| 1. | Wallowa County | 24.6 |
| 2. | Grant County | 25.5 |
| 3. | Baker County | 28.0 |
| 4. | Gilliam County | 30.1 |
| 5. | Harney County | 31.6 |
| 6. | Wheeler County | 32.2 |
| 7. | Sherman County | 32.8 |
| 8. | Union County | 33.7 |
| 9. | Douglas County | 34.5 |
| 10. | Columbia County | 34.8 |
| 11. | Crook County | 36.4 |
| 12. | Coos County | 37.9 |
| 13. | Curry County | 38.0 |
| 14. | Josephine County | 38.3 |
| 15. | Deschutes County | 39.7 |
| 16. | Clatsop County | 42.3 |
| 17. | Linn County | 43.1 |
| 18. | Lake County | 45.3 |
| 19. | Tillamook County | 45.7 |
| 20. | Lane County | 47.0 |
