#1 Best Private Middle Schools in New Castle County, DE
The Tatnall School
Independent school · Grades Pre-K–12
One of the 3 largest independent schools in Delaware
Wilmington, DE
A+Overall grade457 students6 students per teacher
2026 lists
Best Private Middle Schools in New Castle County, DE
Private schools in New Castle County, DE with middle-school grades and the highest overall grades. Top 24 of 24 schools.
#2 Best Private Middle Schools in New Castle County, DE
St. Annes Episcopal School
Episcopal school · Grades Pre-K–8
One of the most diverse private schools in Delaware
Middletown, DE
A+Overall grade256 students7 students per teacher
#3 Best Private Middle Schools in New Castle County, DE
Ursuline Academy, Lower
Independent Catholic school · Grades 3–8
Smaller classes than 73% of Catholic schools in Delaware
Wilmington, DE
A+Overall grade456 students8 students per teacher
#4 Best Private Middle Schools in New Castle County, DE
St. Edmond's Academy
Independent Catholic school · Grades Pre-K–8
Smaller classes than 64% of Catholic schools in Delaware
Wilmington, DE
A+Overall gradeAll boys158 students9 students per teacher
#5 Best Private Middle Schools in New Castle County, DE
St. Anthony of Padua Grade School
Diocesan school · Grades Pre-K–8
One of the most diverse private schools in Delaware
Wilmington, DE
A+Overall grade161 students9 students per teacher
#6 Best Private Middle Schools in New Castle County, DE
Harvest Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
One of the most diverse private schools in Delaware
New Castle, DE
A+Overall grade94 students8 students per teacher
#7 Best Private Middle Schools in New Castle County, DE
St. Peter Cathedral School
Parish school · Grades Pre-K–8
The smallest classes of any Catholic school in Wilmington
Wilmington, DE
A+Overall grade65 students6 students per teacher
#8 Best Private Middle Schools in New Castle County, DE
Islamic Academy of Delaware
Islamic school · Grades Pre-K–8
The largest of 13 private schools in Delaware
Newark, DE
A+Overall grade124 students5 students per teacher
#9 Best Private Middle Schools in New Castle County, DE
The Independence School
Independent school · Grades Pre-K–8
One of the 3 largest independent schools in Delaware
Newark, DE
AOverall grade384 students8 students per teacher
#10 Best Private Middle Schools in New Castle County, DE
Centerville Layton School
Independent school · Grades K–12
Smaller classes than 91% of independent schools nationwide
Wilmington, DE
AOverall grade88 students3 students per teacher
#11 Best Private Middle Schools in New Castle County, DE
Newark Center for Creative Learning
Alternative school · Grades K–8
Smaller classes than 61% of independent schools nationwide
Newark, DE
AOverall grade73 students7 students per teacher
#12 Best Private Middle Schools in New Castle County, DE
Urban Promise School
Christian school (nondenominational) · Grades Pre-K–12
Smaller classes than 69% of Christian schools in Delaware
Wilmington, DE
AOverall grade85 students6 students per teacher
#13 Best Private Middle Schools in New Castle County, DE
Red Lion Christian Academy
Christian school (nondenominational) · Grades K–12
The largest of 25 Christian schools in Delaware
Bear, DE
AOverall grade695 students10 students per teacher
#14 Best Private Middle Schools in New Castle County, DE
Aquinas Academy
Independent Catholic school · Grades K–12
The only Catholic school in Bear
Bear, DE
B+Overall grade75 students9 students per teacher
#15 Best Private Middle Schools in New Castle County, DE
Fairwinds Christian School
Baptist school · Grades Pre-K–12
One of the most diverse private schools in Delaware
Bear, DE
B+Overall grade173 students12 students per teacher
#16 Best Private Middle Schools in New Castle County, DE
Concord Christian Academy
Baptist school · Grades Pre-K–12
The largest Christian school in Wilmington
Wilmington, DE
B+Overall grade136 students9 students per teacher
#17 Best Private Middle Schools in New Castle County, DE
Caravel Academy
Independent school · Grades Pre-K–12
The only independent school in Bear
Bear, DE
B+Overall grade1,120 students10 students per teacher
#18 Best Private Middle Schools in New Castle County, DE
Harvest Christian Academy New Castle
Christian school (nondenominational) · Grades Pre-K–12
One of the most diverse private schools in Delaware
New Castle, DE
B+Overall grade100 students9 students per teacher
#19 Best Private Middle Schools in New Castle County, DE
St. Mary Magdalen School
Parish school · Grades Pre-K–8
One of the 3 largest Catholic schools in Delaware
Wilmington, DE
B+Overall grade467 students13 students per teacher
#20 Best Private Middle Schools in New Castle County, DE
St. Elizabeth School
Diocesan school · Grades Pre-K–12
One of the most diverse private schools in Delaware
Wilmington, DE
BOverall grade364 students12 students per teacher
#21 Best Private Middle Schools in New Castle County, DE
St. Ann School
Parish school · Grades Pre-K–8
Serving families in Wilmington since at least 2011
Wilmington, DE
BOverall grade200 students16 students per teacher
#22 Best Private Middle Schools in New Castle County, DE
Immaculate Heart of Mary
Diocesan school · Grades Pre-K–8
Serving families in Wilmington since at least 2011
Wilmington, DE
B-Overall grade406 students16 students per teacher
#23 Best Private Middle Schools in New Castle County, DE
Christ the Teacher Catholic School
Diocesan school · Grades Pre-K–8
The only Catholic school in Newark
Newark, DE
B-Overall grade524 students23 students per teacher
#24 Best Private Middle Schools in New Castle County, DE
St. John the Beloved School
Parish school · Grades Pre-K–8
Serving families in Wilmington since at least 2011
Wilmington, DE
B-Overall grade459 students18 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.