| Rank | No Fuel Used Heating House Percentage ▼ | School District / Population |
| 1. | 6.8% | Greycliff Elementary School District / 278 |
| 2. | 5.5% | Avon Elementary School District / 214 |
| 3. | 4.6% | Melstone High School District / 250 |
| 4. | 3.2% | Whitewater K-12 Schools / 123 |
| 5. | 3.1% | Lavina K-12 Schools / 441 |
| 6. | 3.0% | Rau Elementary School District / 286 |
| 7. | 2.6% | Augusta Elementary School District / 763 |
| 8. | 2.6% | Augusta High School District / 770 |
| 9. | 2.6% | Target Range Elementary School District / 3,331 |
| 10. | 2.5% | Paradise Elementary School District / 389 |
| 11. | 2.3% | Sand Springs Elementary School District / 111 |
| 12. | 2.2% | Medicine Lake K-12 Schools / 868 |
| 13. | 2.0% | Melstone Elementary School District / 492 |
| 14. | 1.6% | Jackson Elementary School District / 140 |
| 15. | 1.5% | Helena Flats Elementary School District / 1,884 |
| 16. | 1.4% | Lindsay Elementary School District / 339 |
| 17. | 1.3% | Ennis K-12 Schools / 3,471 |
| 17. | 1.3% | Roberts K-12 Schools / 697 |
| 19. | 1.2% | Cardwell Elementary School District / 397 |
| 20. | 1.2% | Glendive Elementary School District / 6,490 |
| 21. | 1.1% | Frontier Elementary School District / 648 |
| 22. | 1.1% | Cayuse Prairie Elementary School District / 2,703 |
| 23. | 1.1% | Dawson High School District / 8,567 |
| 24. | 1.0% | Sweet Grass County High School District / 3,533 |
| 25. | 0.9% | Huntley Project K-12 Schools / 3,701 |
| 26. | 0.9% | Whitehall High School District / 3,632 |
| 26. | 0.9% | Whitehall Elementary School District / 3,133 |
| 28. | 0.9% | Hysham K-12 Schools / 698 |
| 29. | 0.9% | Hardin High School District / 8,303 |
| 30. | 0.8% | Lima K-12 Schools / 516 |
| 31. | 0.8% | Hardin Elementary School District / 9,474 |
| 32. | 0.8% | Potomac Elementary School District / 895 |
| 33. | 0.7% | Ashland Elementary School District / 1,110 |
| 34. | 0.7% | Hellgate Elementary School District / 13,221 |
| 35. | 0.6% | Sidney High School District / 7,731 |
| 36. | 0.6% | Whitefish Elementary School District / 13,286 |
| 37. | 0.6% | La Motte Elementary School District / 792 |
| 37. | 0.6% | Sheridan Elementary School District / 1,320 |
| 37. | 0.6% | Lame Deer Elementary School District / 2,767 |
| 37. | 0.6% | Fort Benton Elementary School District / 1,790 |
| 37. | 0.6% | Malta K-12 Schools / 3,272 |
| 42. | 0.6% | Conrad Elementary School District / 3,357 |
| 43. | 0.6% | Smith Valley Elementary School District / 1,982 |
| 43. | 0.6% | Whitefish High School District / 13,999 |
| 45. | 0.6% | Conrad High School District / 3,568 |
| 46. | 0.6% | Victor K-12 Schools / 3,338 |
| 47. | 0.5% | Big Timber Elementary School District / 2,719 |
| 48. | 0.5% | Bridger K-12 Schools / 1,528 |
| 48. | 0.5% | Sidney Elementary School District / 7,143 |
| 50. | 0.5% | Fort Benton High School District / 2,149 |
| 51. | 0.5% | Philipsburg K-12 Schools / 1,557 |
| 51. | 0.5% | Seeley Lake Elementary School District / 1,777 |
| 53. | 0.5% | Lame Deer High School District / 5,174 |
| 54. | 0.5% | Sheridan High School District / 1,622 |
| 55. | 0.5% | Somers Elementary School District / 5,769 |
| 55. | 0.5% | Vaughn Elementary School District / 1,054 |
| 55. | 0.5% | East Helena Elementary School District / 9,157 |
| 55. | 0.5% | Deer Creek Elementary School District / 1,719 |
| 59. | 0.5% | Clancy Elementary School District / 2,732 |
| 60. | 0.4% | Denton Elementary School District / 581 |
| 61. | 0.4% | Missoula High School District / 100,130 |
| 62. | 0.4% | Denton High School District / 610 |
| 63. | 0.4% | Geraldine Elementary School District / 610 |
| 64. | 0.4% | Arrowhead Elementary School District / 1,889 |
| 64. | 0.4% | Alberton K-12 Schools / 1,198 |
| 66. | 0.4% | Geraldine High School District / 664 |
| 66. | 0.4% | Butte Elementary School District / 32,639 |
| 68. | 0.4% | Billings Elementary School District / 107,997 |
| 69. | 0.4% | De Smet Elementary School District / 694 |
| 69. | 0.4% | Great Falls Elementary School District / 71,331 |
| 69. | 0.4% | Great Falls High School District / 71,447 |
| 69. | 0.4% | Butte High School District / 34,143 |
| 73. | 0.4% | Missoula Elementary School District / 69,543 |
| 73. | 0.4% | Fair-Mont-Egan Elementary School District / 1,449 |
| 75. | 0.4% | Canyon Creek Elementary School District / 2,211 |
| 76. | 0.3% | Chester-Joplin-Inverness Elementary School District / 2,263 |
| 77. | 0.3% | Chester-Joplin-Inverness High School District / 2,451 |
| 77. | 0.3% | Billings High School District / 128,803 |
| 77. | 0.3% | Stevensville Elementary School District / 7,158 |
| 80. | 0.3% | Miles City Elementary School District / 9,908 |
| 81. | 0.3% | Stevensville High School District / 10,559 |
| 81. | 0.3% | Bozeman Elementary School District / 51,299 |
| 83. | 0.3% | Bozeman High School District / 57,488 |
| 84. | 0.3% | Custer County High School District / 11,706 |
| 85. | 0.3% | Plains High School District / 3,250 |
| 86. | 0.3% | Name N/A / 878,315 |
| 87. | 0.3% | Powell County High School District / 7,234 |
| 87. | 0.3% | Lone Rock Elementary School District / 3,401 |
| 89. | 0.2% | Helena High School District / 61,687 |
| 90. | 0.2% | Anaconda Elementary School District / 9,029 |
| 90. | 0.2% | Anaconda High School District / 9,110 |
| 90. | 0.2% | Garfield County High School District / 1,100 |
| 93. | 0.2% | Helena Elementary School District / 50,452 |
| 94. | 0.2% | Flathead High School District / 56,804 |
| 94. | 0.2% | Jefferson High School District / 8,101 |
| 94. | 0.2% | Simms High School District / 3,312 |
| 97. | 0.2% | Wolf Point High School District / 4,527 |
| 98. | 0.1% | Park High School District / 12,435 |
| 99. | 0.0% | Beaverhead County High School District / 8,712 |
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.
