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 | 11.4 |
| 2. | Carter County | 12.8 |
| 3. | Liberty County | 13.0 |
| 4. | Petroleum County | 14.1 |
| 5. | Fallon County | 15.3 |
| 6. | Judith Basin County | 17.0 |
| 7. | Fergus County | 17.1 |
| 8. | McCone County | 17.3 |
| 9. | Granite County | 17.5 |
| 10. | Prairie County | 18.4 |
| 11. | Meagher County | 19.2 |
| 12. | Carbon County | 19.8 |
| 13. | Wibaux County | 20.0 |
| 14. | Broadwater County | 20.5 |
| 15. | Teton County | 21.0 |
| 16. | Sweet Grass County | 21.2 |
| 17. | Park County | 21.4 |
| 18. | Madison County | 21.9 |
| 19. | Deer Lodge County | 22.1 |
| 20. | Powder River County | 22.1 |
