| Rank | Welsh as First Ancestry Population Percentage ▼ | School District / Population |
| 1. | 1.1% | Beaufort County School District within Beaufort Marine Corps Air Station / 2,086 |
| 1. | 1.1% | Beaufort Marine Corps Air Station School District / 2,086 |
| 3. | 1.0% | Beaufort County School District / 153,464 |
| 4. | 1.0% | Oconee County School District / 73,035 |
| 5. | 0.9% | York School District 4 / 44,706 |
| 6. | 0.9% | Pickens County School District / 117,823 |
| 7. | 0.9% | Berkeley County School District / 169,878 |
| 8. | 0.9% | Horry County School District / 258,267 |
| 9. | 0.9% | Laurens School District 55 / 37,902 |
| 10. | 0.8% | Florence School District 1 / 95,432 |
| 11. | 0.8% | Florence School District 2 / 6,864 |
| 12. | 0.8% | Calhoun County School District / 15,212 |
| 13. | 0.8% | Anderson School District 1 / 48,759 |
| 14. | 0.7% | York School District 1 / 30,352 |
| 15. | 0.7% | Anderson School District 4 / 20,227 |
| 15. | 0.7% | Charleston County School District / 342,434 |
| 15. | 0.7% | Jasper County School District / 23,634 |
| 15. | 0.7% | Spartanburg School District 1 / 30,355 |
| 15. | 0.7% | York School District 3 / 107,537 |
| 20. | 0.7% | Spartanburg School District 4 / 17,733 |
| 21. | 0.7% | Lexington School District 1 / 111,856 |
| 22. | 0.7% | Greenville County School District / 451,008 |
| 23. | 0.7% | Greenwood School District 52 / 7,334 |
| 24. | 0.7% | Lexington School District 5 / 89,967 |
| 24. | 0.7% | Anderson School District 2 / 22,764 |
| 26. | 0.6% | Aiken County School District / 159,958 |
| 27. | 0.6% | Cherokee County School District / 52,927 |
| 27. | 0.6% | McCormick County School District / 10,203 |
| 29. | 0.6% | Lexington School District 2 / 62,801 |
| 30. | 0.6% | Newberry County School District / 37,197 |
| 31. | 0.6% | Dorchester School District 2 / 113,086 |
| 32. | 0.5% | Chester County School District / 33,246 |
| 33. | 0.5% | Georgetown County School District / 60,236 |
| 34. | 0.5% | Spartanburg School District 3 / 17,123 |
| 35. | 0.5% | Name N/A / 16,167 |
| 36. | 0.5% | Spartanburg School District 2 / 54,519 |
| 37. | 0.5% | Richland School District 1 / 201,777 |
| 37. | 0.5% | Edgefield County School District / 26,680 |
| 37. | 0.5% | Anderson School District 5 / 77,421 |
| 40. | 0.4% | Dillon School District 2 / 18,788 |
| 41. | 0.4% | Sumter School District 2 / 54,959 |
| 42. | 0.4% | Richland School District 2 / 116,263 |
| 42. | 0.4% | Abbeville County School District / 24,451 |
| 44. | 0.4% | Anderson School District 3 / 14,874 |
| 44. | 0.4% | Kershaw County School District / 60,166 |
| 44. | 0.4% | Sumter School District 17 / 51,642 |
| 44. | 0.4% | Fort Jackson Schools / 14,081 |
| 44. | 0.4% | Richland County School District 2 within Fort Jackson / 14,081 |
| 49. | 0.4% | Marion School District 2 / 11,925 |
| 49. | 0.4% | Spartanburg School District 7 / 54,380 |
| 51. | 0.4% | Chesterfield County School District / 46,087 |
| 52. | 0.3% | Darlington County School District / 68,602 |
| 52. | 0.3% | York School District 2 / 32,321 |
| 54. | 0.3% | Barnwell School District 29 / 5,298 |
| 54. | 0.3% | Marlboro County School District / 29,112 |
| 56. | 0.3% | Marion School District 1 / 15,636 |
| 57. | 0.3% | Greenwood School District 50 / 57,674 |
| 57. | 0.3% | Spartanburg School District 6 / 58,453 |
| 59. | 0.3% | Saluda County School District / 13,902 |
| 60. | 0.3% | Clarendon School District 3 / 6,236 |
| 61. | 0.3% | Dorchester School District 4 / 16,532 |
| 61. | 0.3% | Colleton County School District / 38,833 |
| 63. | 0.2% | Spartanburg School District 5 / 38,993 |
| 63. | 0.2% | Marion School District 7 / 6,007 |
| 65. | 0.2% | Lancaster County School District / 72,302 |
| 66. | 0.2% | Dillon School District 3 / 7,710 |
| 67. | 0.2% | Dillon School District 1 / 5,168 |
| 68. | 0.2% | Lexington School District 4 / 16,954 |
| 68. | 0.2% | Fairfield County School District / 24,040 |
| 70. | 0.1% | Lee County School District / 19,615 |
| 71. | 0.1% | Florence School District 4 / 6,875 |
| 71. | 0.1% | Bamberg School District 1 / 8,347 |
| 73. | 0.1% | Orangeburg School District 3 / 20,285 |
| 74. | 0.1% | Laurens School District 56 / 20,085 |
| 75. | 0.1% | Clarendon School District 1 / 9,313 |
| 75. | 0.1% | Florence School District 5 / 5,788 |
| 77. | 0.1% | Orangeburg School District 4 / 20,421 |
| 78. | 0.1% | Orangeburg School District 5 / 51,769 |
| 78. | 0.1% | Florence School District 3 / 19,938 |
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.
*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.
