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 | 10.7 |
| 2. | Carter County | 10.9 |
| 3. | Liberty County | 12.1 |
| 4. | Petroleum County | 13.3 |
| 5. | Fallon County | 14.8 |
| 6. | Fergus County | 17.4 |
| 7. | McCone County | 17.7 |
| 8. | Judith Basin County | 17.8 |
| 9. | Carbon County | 18.2 |
| 10. | Granite County | 18.3 |
| 11. | Meagher County | 18.8 |
| 12. | Teton County | 19.5 |
| 13. | Wibaux County | 19.7 |
| 14. | Madison County | 19.8 |
| 15. | Broadwater County | 20.5 |
| 16. | Powder River County | 20.8 |
| 17. | Prairie County | 21.0 |
| 18. | Park County | 21.2 |
| 19. | Lincoln County | 21.2 |
| 20. | Sweet Grass County | 21.3 |
