#1 Best Private Middle 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 Middle Schools in Charleston County, SC
Private schools in Charleston County, SC with middle-school grades and the highest overall grades. Top 22 of 22 schools.
#2 Best Private Middle 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 Middle 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 Middle 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 Middle 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 Middle 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 Middle 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 Middle 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 Middle 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 Middle 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 Middle 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
#12 Best Private Middle 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
#13 Best Private Middle 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
#14 Best Private Middle 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
#15 Best Private Middle 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
#16 Best Private Middle 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
#17 Best Private Middle 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
#18 Best Private Middle 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
#19 Best Private Middle 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
#20 Best Private Middle 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
#21 Best Private Middle 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
#22 Best Private Middle 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.