#1 Private Schools with the Smallest Classes in Wilmington, DE
Centerville Layton School
Independent school · Grades K–12
3.2 students per teacher
Wilmington, DE
AOverall grade88 students3 students per teacher
2026 lists
Private Schools with the Smallest Classes in Wilmington, DE
Private schools in Wilmington, DE with the fewest students per teacher (not counting preschools and special education schools). Top 17 of 17 schools.
#2 Private Schools with the Smallest Classes in Wilmington, DE
Urban Promise School
Christian school (nondenominational) · Grades Pre-K–12
5.5 students per teacher
Wilmington, DE
AOverall grade85 students6 students per teacher
#3 Private Schools with the Smallest Classes in Wilmington, 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
#4 Private Schools with the Smallest Classes in Wilmington, DE
The Tatnall School
Independent school · Grades Pre-K–12
5.6 students per teacher
Wilmington, DE
A+Overall grade457 students6 students per teacher
#5 Private Schools with the Smallest Classes in Wilmington, 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
#6 Private Schools with the Smallest Classes in Wilmington, 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
#7 Private Schools with the Smallest Classes in Wilmington, DE
Ursuline Academy, Lower
Independent Catholic school · Grades 3–8
7.8 students per teacher
Wilmington, DE
A+Overall grade456 students8 students per teacher
#8 Private Schools with the Smallest Classes in Wilmington, 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
#9 Private Schools with the Smallest Classes in Wilmington, DE
Concord Christian Academy
Baptist school · Grades Pre-K–12
8.6 students per teacher
Wilmington, DE
B+Overall grade136 students9 students per teacher
#10 Private Schools with the Smallest Classes in Wilmington, 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
#11 Private Schools with the Smallest Classes in Wilmington, DE
Padua Academy
Diocesan school · Grades 9–12
11.2 students per teacher
Wilmington, DE
A+Overall gradeAll girls424 students11 students per teacher
#12 Private Schools with the Smallest Classes in Wilmington, DE
St. Elizabeth School
Diocesan school · Grades Pre-K–12
12.2 students per teacher
Wilmington, DE
BOverall grade364 students12 students per teacher
#13 Private Schools with the Smallest Classes in Wilmington, DE
St. Mary Magdalen School
Parish school · Grades Pre-K–8
13 students per teacher
Wilmington, DE
B+Overall grade467 students13 students per teacher
#14 Private Schools with the Smallest Classes in Wilmington, DE
St. Ann School
Parish school · Grades Pre-K–8
15.6 students per teacher
Wilmington, DE
BOverall grade200 students16 students per teacher
#15 Private Schools with the Smallest Classes in Wilmington, DE
Immaculate Heart of Mary
Diocesan school · Grades Pre-K–8
16.4 students per teacher
Wilmington, DE
B-Overall grade406 students16 students per teacher
#16 Private Schools with the Smallest Classes in Wilmington, DE
St. Mark's High School
Diocesan school · Grades 9–12
16.6 students per teacher
Wilmington, DE
BOverall grade829 students17 students per teacher
#17 Private Schools with the Smallest Classes in Wilmington, DE
St. John the Beloved School
Parish school · Grades Pre-K–8
17.9 students per teacher
Wilmington, DE
B-Overall grade459 students18 students per teacher
From official public records, updated October 2026.