Montana 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. | Garfield County | 11.9 |
| 2. | Carter County | 13.1 |
| 3. | Petroleum County | 13.5 |
| 4. | Liberty County | 15.1 |
| 5. | Fallon County | 16.6 |
| 6. | McCone County | 17.4 |
| 7. | Judith Basin County | 17.9 |
| 8. | Prairie County | 18.3 |
| 9. | Fergus County | 18.6 |
| 10. | Granite County | 18.9 |
| 11. | Meagher County | 19.7 |
| 12. | Carbon County | 20.6 |
| 13. | Broadwater County | 21.0 |
| 14. | Sweet Grass County | 21.3 |
| 15. | Park County | 21.6 |
| 16. | Deer Lodge County | 21.7 |
| 17. | Teton County | 21.9 |
| 18. | Treasure County | 22.5 |
| 19. | Lincoln County | 22.5 |
| 20. | Powder River County | 22.6 |
