#1 Largest Private Schools in Adams County, CO
Flatirons Academy
Christian school (nondenominational) · Grades K–12
515 students
Westminster, CO
B-Overall grade515 students16 students per teacher
2026 lists
Largest Private Schools in Adams County, CO
The private schools in Adams County, CO with the most students. Top 13 of 13 schools.
#2 Largest Private Schools in Adams County, CO
Face School
Christian school (nondenominational) · Grades Pre-K–12
351 students
Westminster, CO
A+Overall grade351 students4 students per teacher
#3 Largest Private Schools in Adams County, CO
Frassati Catholic Academy
Diocesan school · Grades Pre-K–8
299 students
Thornton, CO
BOverall grade299 students15 students per teacher
#4 Largest Private Schools in Adams County, CO
Belleview Christian School
Christian school (nondenominational) · Grades Pre-K–12
284 students
Westminster, CO
BOverall grade284 students11 students per teacher
#5 Largest Private Schools in Adams County, CO
Zion Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
201 students
Brighton, CO
BOverall grade201 students13 students per teacher
#6 Largest Private Schools in Adams County, CO
Blessed Miguel Pro Catholic Academy
Diocesan school · Grades Pre-K–8
143 students
Westminster, CO
B-Overall grade143 students13 students per teacher
#7 Largest Private Schools in Adams County, CO
Assumption Catholic School
Diocesan school · Grades Pre-K–8
128 students
Denver, CO
A-Overall grade128 students11 students per teacher
#8 Largest Private Schools in Adams County, CO
Lord of Life Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
91 students
Thornton, CO
BOverall grade91 students17 students per teacher
#9 Largest Private Schools in Adams County, CO
Rocky Mountain Lutheran High School
Lutheran (Wisconsin Synod) school · Grades 9–12
57 students
Commerce City, CO
A-Overall grade57 students9 students per teacher
#10 Largest Private Schools in Adams County, CO
Compositive Primary
Montessori school · Grades K–4
54 students
Aurora, CO
BOverall grade54 students10 students per teacher
#11 Largest Private Schools in Adams County, CO
Brighton Adventist Academy
Seventh-day Adventist school · Grades Pre-K–10
46 students
Brighton, CO
AOverall grade46 students8 students per teacher
#12 Largest Private Schools in Adams County, CO
Primrose School at Reunion
Early childhood program · Grades Pre-K–K
24 students
Commerce City, CO
A-Overall grade24 students12 students per teacher
#13 Largest Private Schools in Adams County, CO
Cedarwood Christian Academy
Christian school (nondenominational) · Grades 1–12
21 students
Aurora, CO
AOverall grade21 students4 students per teacher
From official public records, updated October 2026.