#1 Best Private Schools in Charleston County, SC
Ashley Hall School
Independent school · Grades Pre-K–12
The smallest classes of any independent school in Charleston
Charleston, SC
A+Overall grade543 students6 students per teacher
2026 lists
Best Private Schools in Charleston County, SC
Private schools in Charleston County, SC with the highest overall grades. Top 24 of 24 schools.
#2 Best Private Schools in Charleston County, SC
Porter-Gaud School
Episcopal school · Grades 1–12
The largest Christian school in Charleston
Charleston, SC
A+Overall grade1,071 students9 students per teacher
#3 Best Private Schools in Charleston County, SC
Nativity School
Parish school · Grades Pre-K–8
The smallest classes of any Catholic school in Charleston
Charleston, SC
A+Overall grade91 students7 students per teacher
#4 Best Private Schools in Charleston County, SC
The Charleston Catholic School
Parish school · Grades Pre-K–8
Smaller classes than 73% of Catholic schools in South Carolina
Charleston, SC
A+Overall grade163 students8 students per teacher
#5 Best Private Schools in Charleston County, SC
Northside Christian School
Baptist school · Grades Pre-K–12
90% of graduates go to four-year colleges
North Charleston, SC
A+Overall grade227 students10 students per teacher
#6 Best Private Schools in Charleston County, SC
Charleston Collegiate School
Independent school · Grades Pre-K–12
95% of graduates go to four-year colleges
Johns Island, SC
A+Overall grade363 students8 students per teacher
#7 Best Private Schools in Charleston County, SC
Sundrops Montessori School
Montessori school · Grades Pre-K–9
Smaller classes than 99% of Montessori schools nationwide
Mount Pleasant, SC
A+Overall grade66 students2 students per teacher
#8 Best Private Schools in Charleston County, SC
University School of the Lowcountry
Independent school · Grades 3–12
The only independent school in Mount Pleasant
Mount Pleasant, SC
AOverall grade84 students7 students per teacher
#9 Best Private Schools in Charleston County, SC
Addlestone Hebrew Academy
Jewish day school · Grades K–8
Smaller classes than 91% of Jewish day schools nationwide
Charleston, SC
AOverall grade61 students4 students per teacher
#10 Best Private Schools in Charleston County, SC
Blessed Sacrament Catholic School
Diocesan school · Grades Pre-K–8
Serving families in Charleston since at least 2011
Charleston, SC
A-Overall grade231 students10 students per teacher
#11 Best Private Schools in Charleston County, SC
O'Quinn Schools of Porter-Gaud (2 Campuses)
Early childhood program · Grades Pre-K–K
The largest of 56 preschools in South Carolina
Mount Pleasant, SC
A-Overall grade97 students7 students per teacher
#12 Best Private Schools in Charleston County, SC
Addlestone Hebrew Academy
Jewish day school · Grades Pre-K–8
Small classes: about 6 students per teacher
Charleston, SC
A-Overall grade60 students6 students per teacher
#13 Best Private Schools in Charleston County, SC
The Cooper School
Alternative school · Grades K–8
Growing: enrollment up 135% since 2011–12
Charleston, SC
B+Overall grade153 students8 students per teacher
#14 Best Private Schools in Charleston County, SC
Charleston Day School
Independent school · Grades K–8
Small classes: about 7 students per teacher
Charleston, SC
B+Overall grade246 students7 students per teacher
#15 Best Private Schools in Charleston County, SC
Mason Preparatory School
Christian school (nondenominational) · Grades K–8
Serving families in Charleston since at least 2011
Charleston, SC
BOverall grade300 students9 students per teacher
#16 Best Private Schools in Charleston County, SC
Sundrops Montessori Bridge Campus
Montessori school · Grades Pre-K–9
One of 2 Montessori schools in Mount Pleasant
Mount Pleasant, SC
BOverall grade66 students11 students per teacher
#17 Best Private Schools in Charleston County, SC
Palmetto Christian Academy
Baptist school · Grades Pre-K–12
93% of graduates go to four-year colleges
Mount Pleasant, SC
BOverall grade678 students12 students per teacher
#18 Best Private Schools in Charleston County, SC
Charleston Bilingual Academy
Christian school (nondenominational) · Grades Pre-K–7
One of the most diverse private schools in South Carolina
North Charleston, SC
BOverall grade194 students15 students per teacher
#19 Best Private Schools in Charleston County, SC
Meeting Street Academy
Independent school · Grades Pre-K–5
Growing: enrollment up 25% since 2017–18
Charleston, SC
BOverall grade209 students8 students per teacher
#20 Best Private Schools in Charleston County, SC
Christ Our King-Stella Mans School
Parish school · Grades Pre-K–8
The only Catholic school in Mount Pleasant
Mount Pleasant, SC
B-Overall grade602 students13 students per teacher
#21 Best Private Schools in Charleston County, SC
First Baptist School of Charleston
Baptist school · Grades Pre-K–12
Serving families in Charleston since at least 2011
Charleston, SC
B-Overall grade501 students12 students per teacher
#22 Best Private Schools in Charleston County, SC
James Island Christian School
Christian school (nondenominational) · Grades Pre-K–8
One of 8 Christian schools in Charleston
Charleston, SC
B-Overall grade221 students8 students per teacher
#23 Best Private Schools in Charleston County, SC
Palmetto Christian Academy
Baptist school · Grades Pre-K–12
97% of graduates go to four-year colleges
Mount Pleasant, SC
B-Overall grade677 students12 students per teacher
#24 Best Private Schools in Charleston County, SC
James Island Christian School
Christian school (nondenominational) · Grades Pre-K–8
One of 8 Christian schools in Charleston
Charleston, SC
B-Overall grade218 students11 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.