Ranking of South Carolina Counties By Percentage of Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)

Updated on September 3, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the population of South Carolina (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 28.74%. Among all South Carolina counties, Marlboro County had the highest percentage of its population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (47.99%), followed by Marion County (47.59%), and Hampton County (44.08%).

The chart below shows the top 10 South Carolina counties, and the table below shows the ranking of all South Carolina counties.

You can see similar information for other educational attainments.

You can also see similar information for other states and for the United States.

Ranking of South Carolina Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
Marlboro County
Marion County
Hampton County
Williamsburg County
Colleton County
Dillon County
Fairfield County
Chester County
Allendale County
Chesterfield County
Ranking of South Carolina Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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Rank County Percentage of Population (Aged 25yrs+) (%)
1 Marlboro County 47.99
2 Marion County 47.59
3 Hampton County 44.08
4 Williamsburg County 42.70
5 Colleton County 42.49
5 Dillon County 42.49
6 Fairfield County 42.38
7 Chester County 41.47
8 Allendale County 39.59
9 Chesterfield County 39.28
10 Lee County 39.27
11 Union County 38.14
12 Cherokee County 37.46
13 Abbeville County 36.97
14 Darlington County 36.57
15 Barnwell County 36.51
16 Jasper County 36.47
17 Clarendon County 36.13
18 Calhoun County 35.76
19 Laurens County 35.67
20 Kershaw County 35.66
21 McCormick County 35.21
22 Saluda County 34.97
23 Edgefield County 34.41
24 Newberry County 34.11
25 Horry County 32.85
26 Florence County 32.78
27 Sumter County 31.74
28 Greenwood County 31.72
29 Orangeburg County 31.67
30 Aiken County 31.62
31 Spartanburg County 30.79
32 Anderson County 30.53
33 Pickens County 29.55
34 Berkeley County 29.44
35 Bamberg County 28.67
36 Oconee County 28.46
37 Lancaster County 28.05
38 Georgetown County 27.57
39 Lexington County 27.21
40 Dorchester County 26.10
41 York County 23.81
42 Greenville County 23.25
43 Beaufort County 22.04
44 Richland County 21.65
45 Charleston County 20.99