| Rank | No Fuel Used Heating House Percentage ▼ | School District / Population |
| 1. | 4.9% | Alzada Elementary School District / 175 |
| 2. | 3.5% | Melstone High School District / 307 |
| 3. | 3.4% | Cottonwood Elementary School District / 319 |
| 4. | 3.3% | Peerless K-12 Schools / 157 |
| 5. | 2.9% | Medicine Lake K-12 Schools / 761 |
| 6. | 2.5% | Paradise Elementary School District / 320 |
| 7. | 1.9% | Lone Rock Elementary School District / 3,176 |
| 8. | 1.7% | Melstone Elementary School District / 520 |
| 9. | 1.5% | Bainville K-12 Schools / 412 |
| 10. | 1.5% | Lame Deer Elementary School District / 2,928 |
| 11. | 1.4% | Circle Elementary School District / 1,202 |
| 12. | 1.2% | Glendive Elementary School District / 6,406 |
| 13. | 1.1% | Bridger K-12 Schools / 1,382 |
| 14. | 1.1% | Dawson High School District / 8,432 |
| 15. | 1.0% | Circle High School District / 1,714 |
| 15. | 1.0% | Whitehall Elementary School District / 3,161 |
| 17. | 1.0% | Livingston Elementary School District / 10,375 |
| 18. | 0.9% | Lima K-12 Schools / 454 |
| 18. | 0.9% | Whitehall High School District / 3,638 |
| 20. | 0.9% | Clancy Elementary School District / 2,812 |
| 21. | 0.9% | Park High School District / 12,485 |
| 22. | 0.9% | Stevensville High School District / 10,237 |
| 23. | 0.8% | Geraldine Elementary School District / 595 |
| 24. | 0.8% | Geraldine High School District / 635 |
| 25. | 0.8% | Deer Creek Elementary School District / 1,591 |
| 25. | 0.8% | Pioneer Elementary School District / 1,126 |
| 27. | 0.7% | Lame Deer High School District / 5,207 |
| 28. | 0.7% | Seeley Lake Elementary School District / 1,746 |
| 29. | 0.7% | Carter County High School District / 1,289 |
| 30. | 0.7% | Ramsay Elementary School District / 1,075 |
| 31. | 0.6% | Potomac Elementary School District / 1,164 |
| 32. | 0.6% | Hardin High School District / 7,844 |
| 33. | 0.6% | Smith Valley Elementary School District / 1,980 |
| 33. | 0.6% | West Valley Elementary School District / 3,567 |
| 35. | 0.6% | Arrowhead Elementary School District / 1,625 |
| 36. | 0.6% | Helena Flats Elementary School District / 1,568 |
| 36. | 0.6% | Hardin Elementary School District / 8,883 |
| 38. | 0.5% | Glasgow K-12 Schools / 4,913 |
| 39. | 0.5% | Trinity Elementary School District / 1,408 |
| 39. | 0.5% | Cardwell Elementary School District / 421 |
| 41. | 0.5% | Hellgate Elementary School District / 12,009 |
| 42. | 0.5% | Canyon Creek Elementary School District / 2,143 |
| 43. | 0.5% | Philipsburg K-12 Schools / 1,724 |
| 44. | 0.5% | Stevensville Elementary School District / 7,061 |
| 44. | 0.5% | East Helena Elementary School District / 8,718 |
| 46. | 0.4% | Great Falls High School District / 71,219 |
| 46. | 0.4% | Great Falls Elementary School District / 71,164 |
| 48. | 0.4% | Lewistown Elementary School District / 9,022 |
| 49. | 0.4% | Fergus High School District / 9,230 |
| 50. | 0.4% | Alberton K-12 Schools / 1,167 |
| 51. | 0.4% | Whitefish Elementary School District / 13,487 |
| 52. | 0.4% | Whitefish High School District / 14,045 |
| 53. | 0.4% | Jefferson High School District / 7,975 |
| 54. | 0.4% | Arlee Elementary School District / 2,488 |
| 54. | 0.4% | Arlee High School District / 2,488 |
| 56. | 0.4% | Blue Creek Elementary School District / 2,472 |
| 57. | 0.3% | Billings Elementary School District / 104,812 |
| 58. | 0.3% | Plains High School District / 3,254 |
| 59. | 0.3% | Billings High School District / 125,086 |
| 60. | 0.3% | Butte High School District / 33,769 |
| 61. | 0.3% | Butte Elementary School District / 32,463 |
| 62. | 0.3% | Missoula High School District / 98,293 |
| 63. | 0.3% | Bozeman Elementary School District / 51,052 |
| 63. | 0.3% | Missoula Elementary School District / 68,124 |
| 65. | 0.2% | Name N/A / 866,873 |
| 66. | 0.2% | Miles City Elementary School District / 9,973 |
| 66. | 0.2% | Helena High School District / 59,916 |
| 68. | 0.2% | Sidney Elementary School District / 6,474 |
| 68. | 0.2% | Bozeman High School District / 58,415 |
| 70. | 0.2% | Sidney High School District / 7,099 |
| 71. | 0.2% | Custer County High School District / 11,548 |
| 72. | 0.2% | Helena Elementary School District / 49,204 |
| 73. | 0.1% | Havre High School District / 12,707 |
| 74. | 0.1% | Flathead High School District / 55,349 |
Please note that we only rank locations with 'No Fuel Used Heating House Percentage' data. The rank above might not be a complete list. Locations without 'No Fuel Used Heating House Percentage' data are not listed.
*ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.
