#1 Private Schools with the Smallest Classes in Joliet, IL
St. Paul the Apostle School
Diocesan school · Grades K–8
13.3 students per teacher
Joliet, IL
A+Overall grade145 students13 students per teacher
2026 lists
Private Schools with the Smallest Classes in Joliet, IL
Private schools in Joliet, IL with the fewest students per teacher (not counting preschools and special education schools). Top 5 of 5 schools.
#2 Private Schools with the Smallest Classes in Joliet, IL
Joliet Catholic Academy
Independent Catholic school · Grades 9–12
15.5 students per teacher
Joliet, IL
BOverall grade598 students16 students per teacher
#3 Private Schools with the Smallest Classes in Joliet, IL
Cathedral of St. Raymond School
Parish school · Grades Pre-K–8
15.8 students per teacher
Joliet, IL
BOverall grade277 students16 students per teacher
#4 Private Schools with the Smallest Classes in Joliet, IL
St. Jude Catholic School
Diocesan school · Grades Pre-K–8
16.9 students per teacher
Joliet, IL
BOverall grade171 students17 students per teacher
#5 Private Schools with the Smallest Classes in Joliet, IL
St. Mary Nativity School
Parish school · Grades Pre-K–8
17.4 students per teacher
Joliet, IL
B+Overall grade139 students17 students per teacher
From official public records, updated October 2026.