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. | Grant County | 25.1 |
| 2. | Wallowa County | 26.9 |
| 3. | Baker County | 28.0 |
| 4. | Gilliam County | 31.1 |
| 5. | Harney County | 32.0 |
| 6. | Wheeler County | 34.4 |
| 7. | Union County | 34.8 |
| 8. | Douglas County | 36.2 |
| 9. | Columbia County | 37.0 |
| 10. | Sherman County | 37.5 |
| 11. | Crook County | 38.0 |
| 12. | Curry County | 39.0 |
| 13. | Coos County | 39.1 |
| 14. | Josephine County | 39.9 |
| 15. | Deschutes County | 40.7 |
| 16. | Clatsop County | 43.5 |
| 17. | Linn County | 44.7 |
| 18. | Tillamook County | 46.2 |
| 19. | Lake County | 47.4 |
| 20. | Lincoln County | 47.8 |
