#1 Private Schools with the Smallest Classes in New Castle County, DE
The Hockessin Montessori School
Montessori school · Grades Pre-K–8
2.8 students per teacher
Hockessin, DE
A+Overall grade47 students3 students per teacher
2026 lists
Private Schools with the Smallest Classes in New Castle County, DE
Private schools in New Castle County, DE with the fewest students per teacher (not counting preschools and special education schools). Top 32 of 32 schools.
#2 Private Schools with the Smallest Classes in New Castle County, DE
Centerville Layton School
Independent school · Grades K–12
3.2 students per teacher
Wilmington, DE
AOverall grade88 students3 students per teacher
#3 Private Schools with the Smallest Classes in New Castle County, DE
Towle Institute
Christian school (nondenominational) · Grades 6–12
4 students per teacher
Hockessin, DE
AOverall grade40 students4 students per teacher
#4 Private Schools with the Smallest Classes in New Castle County, DE
Islamic Academy of Delaware
Islamic school · Grades Pre-K–8
4.7 students per teacher
Newark, DE
A+Overall grade124 students5 students per teacher
#5 Private Schools with the Smallest Classes in New Castle County, DE
Urban Promise School
Christian school (nondenominational) · Grades Pre-K–12
5.5 students per teacher
Wilmington, DE
AOverall grade85 students6 students per teacher
#6 Private Schools with the Smallest Classes in New Castle County, DE
St. Peter Cathedral School
Parish school · Grades Pre-K–8
5.5 students per teacher
Wilmington, DE
A+Overall grade65 students6 students per teacher
#7 Private Schools with the Smallest Classes in New Castle County, DE
The Tatnall School
Independent school · Grades Pre-K–12
5.6 students per teacher
Wilmington, DE
A+Overall grade457 students6 students per teacher
#8 Private Schools with the Smallest Classes in New Castle County, DE
Serviam Girls Academy
Christian school (nondenominational) · Grades 5–8
5.6 students per teacher
Wilmington, DE
A+Overall gradeAll girls44 students6 students per teacher
#9 Private Schools with the Smallest Classes in New Castle County, DE
St. Andrew's School
Episcopal school · Grades 9–12
5.9 students per teacher
Middletown, DE
A+Overall grade320 students6 students per teacher
#10 Private Schools with the Smallest Classes in New Castle County, DE
Learning Express Academy
Independent school · Grades K–8
6.4 students per teacher
Newark, DE
AOverall grade55 students6 students per teacher
#11 Private Schools with the Smallest Classes in New Castle County, DE
Newark Center for Creative Learning
Alternative school · Grades K–8
6.5 students per teacher
Newark, DE
AOverall grade73 students7 students per teacher
#12 Private Schools with the Smallest Classes in New Castle County, DE
St. Annes Episcopal School
Episcopal school · Grades Pre-K–8
7.3 students per teacher
Middletown, DE
A+Overall grade256 students7 students per teacher
#13 Private Schools with the Smallest Classes in New Castle County, DE
The Independence School
Independent school · Grades Pre-K–8
7.6 students per teacher
Newark, DE
AOverall grade384 students8 students per teacher
#14 Private Schools with the Smallest Classes in New Castle County, DE
Nativity Preparatory School of Wilmington
Diocesan school · Grades 5–8
7.6 students per teacher
Wilmington, DE
A+Overall gradeAll boys53 students8 students per teacher
#15 Private Schools with the Smallest Classes in New Castle County, DE
Ursuline Academy, Lower
Independent Catholic school · Grades 3–8
7.8 students per teacher
Wilmington, DE
A+Overall grade456 students8 students per teacher
#16 Private Schools with the Smallest Classes in New Castle County, DE
Harvest Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
8.2 students per teacher
New Castle, DE
A+Overall grade94 students8 students per teacher
#17 Private Schools with the Smallest Classes in New Castle County, DE
St. Edmond's Academy
Independent Catholic school · Grades Pre-K–8
8.6 students per teacher
Wilmington, DE
A+Overall gradeAll boys158 students9 students per teacher
#18 Private Schools with the Smallest Classes in New Castle County, DE
Concord Christian Academy
Baptist school · Grades Pre-K–12
8.6 students per teacher
Wilmington, DE
B+Overall grade136 students9 students per teacher
#19 Private Schools with the Smallest Classes in New Castle County, DE
Harvest Christian Academy New Castle
Christian school (nondenominational) · Grades Pre-K–12
8.6 students per teacher
New Castle, DE
B+Overall grade100 students9 students per teacher
#20 Private Schools with the Smallest Classes in New Castle County, DE
Aquinas Academy
Independent Catholic school · Grades K–12
8.9 students per teacher
Bear, DE
B+Overall grade75 students9 students per teacher
#21 Private Schools with the Smallest Classes in New Castle County, DE
St. Anthony of Padua Grade School
Diocesan school · Grades Pre-K–8
9 students per teacher
Wilmington, DE
A+Overall grade161 students9 students per teacher
#22 Private Schools with the Smallest Classes in New Castle County, DE
Red Lion Christian Academy
Christian school (nondenominational) · Grades K–12
9.5 students per teacher
Bear, DE
AOverall grade695 students10 students per teacher
#23 Private Schools with the Smallest Classes in New Castle County, DE
Caravel Academy
Independent school · Grades Pre-K–12
9.7 students per teacher
Bear, DE
B+Overall grade1,120 students10 students per teacher
#24 Private Schools with the Smallest Classes in New Castle County, DE
Padua Academy
Diocesan school · Grades 9–12
11.2 students per teacher
Wilmington, DE
A+Overall gradeAll girls424 students11 students per teacher
From official public records, updated October 2026.