| Rank | Coal or Coke Heating House Percentage ▼ | School District / Population |
| 1. | 1.8% | Marlborough School District / 6,382 |
| 2. | 1.5% | Colebrook School District / 1,493 |
| 3. | 1.4% | Salem School District / 4,151 |
| 4. | 1.2% | Ashford School District / 4,306 |
| 5. | 1.1% | Lebanon School District / 7,289 |
| 6. | 1.0% | Derby School District / 12,858 |
| 7. | 0.9% | Barkhamsted School District / 3,791 |
| 8. | 0.9% | Litchfield School District / 8,454 |
| 9. | 0.9% | North Stonington School District / 5,292 |
| 10. | 0.7% | Wolcott School District / 16,638 |
| 11. | 0.7% | Canaan School District / 1,195 |
| 12. | 0.6% | Pomfret School District / 4,231 |
| 12. | 0.6% | East Haddam School District / 9,120 |
| 14. | 0.6% | Regional School District 13 / 11,794 |
| 15. | 0.6% | Vernon School District / 29,188 |
| 16. | 0.6% | Regional High School District 08 / 19,216 |
| 17. | 0.6% | Willington School District / 6,042 |
| 18. | 0.5% | Regional School District 10 / 14,913 |
| 18. | 0.5% | Columbia School District / 5,464 |
| 20. | 0.5% | Thomaston School District / 7,865 |
| 21. | 0.5% | Chester School District / 4,090 |
| 22. | 0.5% | Regional School District 14 / 13,519 |
| 23. | 0.5% | Regional High School District 07 / 13,700 |
| 24. | 0.4% | Manchester School District / 58,078 |
| 25. | 0.4% | Newington School District / 30,520 |
| 26. | 0.4% | Tolland School District / 14,980 |
| 27. | 0.3% | Regional High School District 19 / 36,530 |
| 28. | 0.3% | Regional School District 18 / 9,959 |
| 29. | 0.3% | Norfolk School District / 1,492 |
| 29. | 0.3% | Old Saybrook School District / 10,268 |
| 31. | 0.3% | Griswold School District / 11,907 |
| 32. | 0.3% | Portland School District / 9,500 |
| 32. | 0.3% | Somers School District / 11,451 |
| 34. | 0.3% | Coventry School District / 12,445 |
| 35. | 0.2% | Seymour School District / 16,487 |
| 35. | 0.2% | New Canaan School District / 19,794 |
| 37. | 0.2% | Plymouth School District / 12,193 |
| 37. | 0.2% | Wilton School District / 18,201 |
| 37. | 0.2% | Granby School District / 11,243 |
| 40. | 0.2% | Groton School District / 40,079 |
| 41. | 0.2% | Orange School District / 13,919 |
| 42. | 0.2% | Name N/A / 217,821 |
| 43. | 0.2% | Regional School District 12 / 7,600 |
| 44. | 0.2% | Branford School District / 28,062 |
| 45. | 0.2% | North Haven School District / 24,037 |
| 45. | 0.2% | Regional School District 15 / 27,363 |
| 47. | 0.2% | Hartford School District / 124,879 |
| 48. | 0.1% | Windsor School District / 29,067 |
| 49. | 0.1% | Regional High School District 04 / 15,408 |
| 49. | 0.1% | West Haven School District / 55,386 |
| 49. | 0.1% | Torrington School District / 36,239 |
| 52. | 0.1% | East Lyme School District / 19,168 |
| 52. | 0.1% | West Hartford School District / 63,157 |
| 54. | 0.1% | South Windsor School District / 25,684 |
| 54. | 0.1% | Regional School District 06 / 6,986 |
| 54. | 0.1% | Regional High School District 05 / 28,433 |
| 57. | 0.1% | Milford School District / 52,826 |
| 57. | 0.1% | Plainville School District / 17,726 |
| 59. | 0.1% | Bridgeport School District / 144,446 |
| 59. | 0.1% | Bristol School District / 60,502 |
| 59. | 0.1% | Danbury School District / 81,057 |
| 59. | 0.1% | Regional High School District 01 / 15,396 |
| 59. | 0.1% | Fairfield School District / 59,562 |
| 64. | 0.1% | Trumbull School District / 36,008 |
| 64. | 0.1% | Southington School District / 43,038 |
| 66. | 0.0% | Stonington School District / 18,528 |
| 67. | 0.0% | New Britain School District / 73,122 |
| 68. | 0.0% | Waterbury School District / 110,074 |
| 68. | 0.0% | Norwalk School District / 85,853 |
Please note that we only rank locations with 'Coal or Coke Heating House Percentage' data. The rank above might not be a complete list. Locations without 'Coal or Coke 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.
