Exhibit 21
BLACK HILLS CORPORATION
SUBSIDIARIES
December 31, 2022
| Subsidiary Name | State of Origin |
1. | Black Hills Colorado Electric, LLC * | Delaware |
2. | Black Hills Colorado Gas, Inc. * | Colorado |
3. | Black Hills Colorado IPP, LLC * | South Dakota |
4. | Black Hills Colorado Wind, LLC | Delaware |
5. | Black Hills Electric Generation, LLC * | South Dakota |
6. | Black Hills Electric Parent Holdings, LLC | South Dakota |
7. | Black Hills Energy Arkansas, Inc. * | Arkansas |
8. | Black Hills Energy Renewable Resources, LLC | South Dakota |
9. | Black Hills Energy Services Company * | Colorado |
10. | Black Hills Exploration and Production, Inc. * | Wyoming |
11. | Black Hills Gas, Inc. | Delaware |
12. | Black Hills Gas, LLC | Delaware |
13. | Black Hills Gas Holdings, LLC | Delaware |
14. | Black Hills Gas Parent Holdings II, Inc. | Delaware |
15. | Black Hills Gas Resources, Inc. * | Colorado |
16. | Black Hills/Iowa Gas Utility Company, LLC * | Delaware |
17. | Black Hills/Kansas Gas Utility Company, LLC * | Kansas |
18. | Black Hills Nebraska Gas, LLC * | Delaware |
19. | Black Hills Non-regulated Holdings, LLC | South Dakota |
20. | Black Hills Plateau Production, LLC * | Delaware |
21. | Black Hills Power, Inc. * | South Dakota |
22. | Black Hills Service Company, LLC * | South Dakota |
23. | Black Hills Shoshone Pipeline, LLC * | Wyoming |
24. | Black Hills Utility Holdings, Inc. * | South Dakota |
25. | Black Hills Wyoming, LLC | Wyoming |
26. | Black Hills Wyoming Gas, LLC * | Wyoming |
27. | Cheyenne Light, Fuel and Power Company * | Wyoming |
28. | Mallon Oil Company, Sucursal Costa Rica | Costa Rica |
29. | N780BH, LLC | South Dakota |
30. | Northern Iowa Windpower LLC | Delaware |
31. | Rocky Mountain Natural Gas LLC * | Colorado |
32. | Wyodak Resources Development Corp. * | Delaware |
* doing business as Black Hills Energy