| County Number | SC Counties | Rate of infant deaths, 1990-99 | County / State Ratio |
|---|---|---|---|
| 1 | Edgefield County | 0.5 | 0.5 |
| 2 | Oconee County | 0.7 | 0.7 |
| 3 | Pickens County | 0.7 | 0.7 |
| 4 | Abbeville County | 0.8 | 0.8 |
| 5 | Barnwell County | 0.8 | 0.8 |
| 6 | Beaufort County | 0.8 | 0.8 |
| 7 | Dorchester County | 0.8 | 0.8 |
| 8 | Greenville County | 0.8 | 0.8 |
| 9 | Horry County | 0.8 | 0.8 |
| 10 | Lexington County | 0.8 | 0.8 |
| 11 | Spartanburg County | 0.8 | 0.8 |
| 12 | Berkeley County | 0.9 | 0.9 |
| 13 | Dillon County | 0.9 | 0.9 |
| 14 | Fairfield County | 0.9 | 0.9 |
| 15 | Jasper County | 0.9 | 0.9 |
| 16 | Kershaw County | 0.9 | 0.9 |
| 17 | Newberry County | 0.9 | 0.9 |
| 18 | Aiken County | 1.0 | 1.0 |
| 19 | Chester County | 1.0 | 1.0 |
| 20 | Colleton County | 1.0 | 1.0 |
| 21 | Georgetown County | 1.0 | 1.0 |
| 22 | Hampton County | 1.0 | 1.0 |
| 23 | Marion County | 1.0 | 1.0 |
| 24 | Marlboro County | 1.0 | 1.0 |
| 25 | Richland County | 1.0 | 1.0 |
| 26 | York County | 1.0 | 1.0 |
| 27 | Anderson County | 1.1 | 1.1 |
| 28 | Bamberg County | 1.1 | 1.1 |
| 29 | Cherokee County | 1.1 | 1.1 |
| 30 | Laurens County | 1.1 | 1.1 |
| 31 | Orangeburg County | 1.1 | 1.1 |
| 32 | Saluda County | 1.1 | 1.1 |
| 33 | Charleston County | 1.2 | 1.2 |
| 34 | Chesterfield County | 1.2 | 1.2 |
| 35 | Florence County | 1.2 | 1.2 |
| 36 | Greenwood County | 1.2 | 1.2 |
| 37 | Lancaster County | 1.2 | 1.2 |
| 38 | Sumter County | 1.2 | 1.2 |
| 39 | Union County | 1.2 | 1.2 |
| 40 | Allendale County | 1.3 | 1.3 |
| 41 | Calhoun County | 1.3 | 1.3 |
| 42 | Darlington County | 1.4 | 1.4 |
| 43 | McCormick County | 1.4 | 1.4 |
| 44 | Williamsburg County | 1.4 | 1.4 |
| 45 | Clarendon County | 1.6 | 1.6 |
| 46 | Lee County | 2.2 | 2.2 |
| 47 | South Carolina | 1.0 |