#1 Largest Private Schools in Denver County, CO
Mullen High School
Independent Catholic school · Grades 9–12
753 students
Denver, CO
A+Overall grade753 students13 students per teacher
2026 lists
Largest Private Schools in Denver County, CO
The private schools in Denver County, CO with the most students. Top 30 of 30 schools.
#2 Largest Private Schools in Denver County, CO
Graland Country Day School
Independent school · Grades Pre-K–8
651 students
Denver, CO
BOverall grade651 students6 students per teacher
#3 Largest Private Schools in Denver County, CO
International School of Denver
Independent school · Grades Pre-K–8
530 students
Denver, CO
BOverall grade530 students7 students per teacher
#4 Largest Private Schools in Denver County, CO
Stanley British Primary School
Independent school · Grades K–8
463 students
Denver, CO
B+Overall grade463 students7 students per teacher
#5 Largest Private Schools in Denver County, CO
Denver Academy
Independent school · Grades 2–12
457 students
Denver, CO
B-Overall grade457 students7 students per teacher
#6 Largest Private Schools in Denver County, CO
Arrupe Jesuit High School
Independent Catholic school · Grades 9–12
413 students
Denver, CO
B-Overall grade413 students17 students per teacher
#7 Largest Private Schools in Denver County, CO
St. Annes Episcopal School
Episcopal school · Grades Pre-K–8
394 students
Denver, CO
B-Overall grade394 students14 students per teacher
#8 Largest Private Schools in Denver County, CO
St. Vincent De Paul Catholic School
Diocesan school · Grades K–8
372 students
Denver, CO
A+Overall grade372 students8 students per teacher
#9 Largest Private Schools in Denver County, CO
Good Shepherd Catholic School
Diocesan school · Grades Pre-K–8
355 students
Denver, CO
BOverall grade355 students15 students per teacher
#10 Largest Private Schools in Denver County, CO
Blessed Sacrament Parish School
Diocesan school · Grades Pre-K–8
327 students
Denver, CO
AOverall grade327 students10 students per teacher
#11 Largest Private Schools in Denver County, CO
Hillel Academy
Jewish day school · Grades Pre-K–8
270 students
Denver, CO
BOverall grade270 students9 students per teacher
#12 Largest Private Schools in Denver County, CO
St. John's School
Lutheran (Missouri Synod) school · Grades K–8
198 students
Denver, CO
A+Overall grade198 students9 students per teacher
#13 Largest Private Schools in Denver County, CO
St. James Catholic School
Diocesan school · Grades Pre-K–8
193 students
Denver, CO
B+Overall grade193 students13 students per teacher
#14 Largest Private Schools in Denver County, CO
Montessori School of Denver
Montessori school · Grades Pre-K–8
192 students
Denver, CO
B+Overall grade192 students7 students per teacher
#15 Largest Private Schools in Denver County, CO
Escuela De Guadalupe
Independent Catholic school · Grades Pre-K–8
189 students
Denver, CO
A-Overall grade189 students12 students per teacher
#16 Largest Private Schools in Denver County, CO
St. Rose of Lima Catholic Academy
Diocesan school · Grades Pre-K–8
185 students
Denver, CO
BOverall grade185 students14 students per teacher
#17 Largest Private Schools in Denver County, CO
Denver Academy of Torah
Jewish day school · Grades K–12
176 students
Denver, CO
B+Overall grade176 students7 students per teacher
#18 Largest Private Schools in Denver County, CO
Notre Dame Parish School
Diocesan school · Grades Pre-K–8
169 students
Denver, CO
A+Overall grade169 students12 students per teacher
#19 Largest Private Schools in Denver County, CO
Bishop Machebeuf High School
Diocesan school · Grades 9–12
164 students
Denver, CO
A+Overall grade164 students8 students per teacher
#20 Largest Private Schools in Denver County, CO
Annunciation
Parish school · Grades K–8
161 students
Denver, CO
AOverall grade161 students12 students per teacher
#21 Largest Private Schools in Denver County, CO
Ricks Center for Gifted Children
Independent school · Grades Pre-K–8
157 students
Denver, CO
A+Overall grade157 students4 students per teacher
#22 Largest Private Schools in Denver County, CO
St. Elizabeth's School
Episcopal school · Grades K–8
133 students
Denver, CO
A+Overall grade133 students5 students per teacher
#23 Largest Private Schools in Denver County, CO
Montessori Academy of Colorado
Montessori school · Grades Pre-K–8
76 students
Denver, CO
A+Overall grade76 students5 students per teacher
#24 Largest Private Schools in Denver County, CO
Yeshiva Toras Chaim High School
Jewish day school · Grades 9–12
67 students
Denver, CO
B+Overall gradeAll boys67 students8 students per teacher
From official public records, updated October 2026.