| Rank | Welsh as First Ancestry Population Percentage ▼ | School District / Population |
| 1. | 1.9% | Anderson School District 4 / 21,928 |
| 2. | 1.2% | Beaufort Marine Corps Air Station School District / 949 |
| 2. | 1.2% | Beaufort County School District within Beaufort Marine Corps Air Station / 949 |
| 2. | 1.2% | Pickens County School District / 119,577 |
| 5. | 1.1% | Beaufort County School District / 167,504 |
| 6. | 1.0% | Lexington School District 5 / 93,939 |
| 7. | 0.9% | Georgetown County School District / 60,389 |
| 8. | 0.9% | Lexington School District 4 / 18,396 |
| 9. | 0.8% | Lexington School District 1 / 126,307 |
| 10. | 0.8% | Oconee County School District / 74,656 |
| 11. | 0.8% | York School District 4 / 54,198 |
| 11. | 0.8% | Greenville County School District / 482,484 |
| 11. | 0.8% | Jasper County School District / 26,042 |
| 14. | 0.7% | Laurens School District 55 / 36,736 |
| 15. | 0.7% | Horry County School District / 283,280 |
| 16. | 0.7% | Charleston County School District / 365,674 |
| 16. | 0.7% | Name N/A / 107,782 |
| 18. | 0.7% | Berkeley County School District / 188,835 |
| 18. | 0.7% | Spartanburg School District 4 / 18,504 |
| 20. | 0.7% | York School District 3 / 112,078 |
| 21. | 0.7% | Richland School District 1 / 206,981 |
| 22. | 0.6% | Anderson School District 2 / 23,295 |
| 22. | 0.6% | Spartanburg School District 5 / 42,810 |
| 22. | 0.6% | Chester County School District / 32,708 |
| 25. | 0.6% | York School District 2 / 36,439 |
| 25. | 0.6% | Florence School District 1 / 100,376 |
| 27. | 0.6% | Darlington County School District / 68,161 |
| 27. | 0.6% | Aiken County School District / 165,978 |
| 29. | 0.5% | Spartanburg School District 2 / 58,913 |
| 29. | 0.5% | Dorchester School District 2 / 126,476 |
| 31. | 0.5% | Laurens School District 56 / 20,894 |
| 32. | 0.5% | Spartanburg School District 7 / 53,770 |
| 33. | 0.5% | York School District 1 / 32,570 |
| 34. | 0.5% | Spartanburg School District 6 / 61,345 |
| 35. | 0.4% | Kershaw County School District / 62,342 |
| 35. | 0.4% | Greenwood School District 50 / 58,892 |
| 37. | 0.4% | Abbeville County School District / 23,891 |
| 38. | 0.4% | Lexington School District 2 / 63,624 |
| 38. | 0.4% | Dorchester School District 4 / 16,296 |
| 38. | 0.4% | Edgefield County School District / 26,573 |
| 41. | 0.4% | Florence School District 3 / 19,559 |
| 42. | 0.4% | Florence School District 5 / 5,213 |
| 42. | 0.4% | Spartanburg School District 3 / 16,307 |
| 44. | 0.4% | McCormick County School District / 10,003 |
| 45. | 0.4% | Dillon School District 2 / 23,452 |
| 46. | 0.4% | Newberry County School District / 37,593 |
| 47. | 0.3% | Name N/A / 15,710 |
| 48. | 0.3% | Clarendon School District 3 / 6,573 |
| 49. | 0.3% | Chesterfield County School District / 46,333 |
| 50. | 0.3% | Barnwell School District 29 / 5,368 |
| 51. | 0.3% | Fort Jackson Schools / 14,761 |
| 51. | 0.3% | Richland County School District 2 within Fort Jackson / 14,761 |
| 53. | 0.3% | Anderson School District 5 / 79,906 |
| 54. | 0.2% | Greenwood School District 52 / 7,364 |
| 54. | 0.2% | Florence School District 2 / 6,878 |
| 56. | 0.2% | Richland School District 2 / 128,949 |
| 57. | 0.2% | Colleton County School District / 38,247 |
| 58. | 0.2% | Calhoun County School District / 15,031 |
| 59. | 0.2% | Fairfield County School District / 23,382 |
| 59. | 0.2% | Clarendon School District 2 / 18,553 |
| 59. | 0.2% | Spartanburg School District 1 / 29,714 |
| 62. | 0.2% | Orangeburg School District 4 / 20,108 |
| 62. | 0.2% | Name N/A / 32,411 |
| 64. | 0.2% | Orangeburg School District 5 / 50,688 |
| 64. | 0.2% | Orangeburg School District 3 / 20,466 |
| 66. | 0.1% | Anderson School District 1 / 49,874 |
| 66. | 0.1% | Cherokee County School District / 53,716 |
| 66. | 0.1% | Greenwood School District 51 / 7,101 |
| 69. | 0.1% | Hampton School District 2 / 7,475 |
| 69. | 0.1% | Anderson School District 3 / 15,039 |
| 71. | 0.1% | Lancaster County School District / 79,515 |
| 72. | 0.1% | Marlboro County School District / 28,294 |
| 72. | 0.1% | Williamsburg County School District / 33,560 |
| 74. | 0.1% | Bamberg School District 1 / 8,611 |
| 74. | 0.1% | Union County School District / 28,329 |
| 74. | 0.1% | Dillon School District 3 / 8,077 |
| 77. | 0.1% | Lexington School District 3 / 12,749 |
| 77. | 0.1% | Saluda County School District / 15,250 |
| 79. | 0.1% | Lee County School District / 18,708 |
| 80. | 0.1% | Allendale County School District / 10,027 |
| 81. | 0.0% | Clarendon School District 1 / 9,313 |
Please note that we only rank locations with 'Welsh as First Ancestry Population Percentage' data. The rank above might not be a complete list. Locations without 'Welsh as First Ancestry Population Percentage' data are not listed.
