Ranking of South Carolina Counties By Percentage of Population Aged 25 years and above with an Educational attainment of Less than High School Diploma 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 Less than High School Diploma was 11.22%. Among all South Carolina counties, Allendale County had the highest percentage of its population (aged 25 years and above) with an educational attainment of Less than High School Diploma (23.81%), followed by Bamberg County (22.43%), and Dillon County (21.26%).

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 Less than High School Diploma in 2021
Allendale County
Bamberg County
Dillon County
Marlboro County
Clarendon County
Chesterfield County
Marion County
Saluda County
Barnwell County
Hampton County
Ranking of South Carolina Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
0 of 0
Rank County Percentage of Population (Aged 25yrs+) (%)
1 Allendale County 23.81
2 Bamberg County 22.43
3 Dillon County 21.26
4 Marlboro County 20.25
5 Clarendon County 20.23
6 Chesterfield County 19.95
7 Marion County 19.61
8 Saluda County 18.72
9 Barnwell County 18.56
10 Hampton County 18.53
11 Edgefield County 17.94
12 Laurens County 17.89
13 Lee County 17.75
14 Union County 17.20
15 Cherokee County 16.66
16 McCormick County 16.50
17 Abbeville County 16.29
18 Williamsburg County 16.07
19 Orangeburg County 15.68
20 Fairfield County 15.47
21 Chester County 15.41
22 Darlington County 15.19
23 Anderson County 14.17
24 Colleton County 14.03
25 Greenwood County 14.02
26 Calhoun County 13.95
27 Oconee County 13.88
28 Newberry County 13.83
29 Florence County 13.70
30 Pickens County 13.40
31 Spartanburg County 12.50
32 Lancaster County 12.11
33 Sumter County 11.93
34 Jasper County 11.22
35 Aiken County 10.71
36 Berkeley County 10.43
37 Greenville County 10.35
38 Georgetown County 10.30
39 Kershaw County 10.23
40 Lexington County 9.61
41 Dorchester County 9.56
42 Horry County 8.91
43 York County 8.39
44 Richland County 8.19
45 Charleston County 7.12
46 Beaufort County 6.60