#1 Largest Private Schools in South Dakota
Sioux Falls Catholic School
Parish school · Grades Pre-K–12
2,231 students
Sioux Falls, SD
B-Overall grade2,231 students22 students per teacher
2026 lists
Largest Private Schools in South Dakota
The private schools in South Dakota with the most students. Top 50 of 56 schools.
#2 Largest Private Schools in South Dakota
Sioux Falls Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
1,382 students
Sioux Falls, SD
B-Overall grade1,382 students17 students per teacher
#3 Largest Private Schools in South Dakota
Rapid City Catholic School System
Diocesan school · Grades Pre-K–12
650 students
Rapid City, SD
BOverall grade650 students12 students per teacher
#4 Largest Private Schools in South Dakota
Aberdeen Catholic Schools
Parish school · Grades Pre-K–12
482 students
Aberdeen, SD
B-Overall grade482 students13 students per teacher
#5 Largest Private Schools in South Dakota
Roncalli Primary School
Parish school · Grades Pre-K–12
482 students
Aberdeen, SD
B-Overall grade482 students13 students per teacher
#6 Largest Private Schools in South Dakota
Red Cloud Indian School
Diocesan school · Grades K–12
435 students
Pine Ridge, SD
A+Overall grade435 students7 students per teacher
#7 Largest Private Schools in South Dakota
O'Gorman Junior High School
Diocesan school · Grades 7–8
329 students
Sioux Falls, SD
BOverall grade329 students12 students per teacher
#8 Largest Private Schools in South Dakota
Sioux Falls Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–12
301 students
Sioux Falls, SD
B-Overall grade301 students13 students per teacher
#9 Largest Private Schools in South Dakota
Sioux Falls Lutheran School
Lutheran (Missouri Synod) school · Grades K–12
295 students
Sioux Falls, SD
B-Overall grade295 students11 students per teacher
#10 Largest Private Schools in South Dakota
St. Elizabeth Seton School
Diocesan school · Grades K–5
285 students
Rapid City, SD
B-Overall grade285 students13 students per teacher
#11 Largest Private Schools in South Dakota
Sacred Heart School
Parish school · Grades Pre-K–8
263 students
Yankton, SD
AOverall grade263 students9 students per teacher
#12 Largest Private Schools in South Dakota
Roncalli Jr. & Sr. High School
Parish school · Grades 6–12
232 students
Aberdeen, SD
B-Overall grade232 students11 students per teacher
#13 Largest Private Schools in South Dakota
Sacred Heart Middle School
Independent Catholic school · Grades Pre-K–8
230 students
Yankton, SD
B+Overall grade230 students9 students per teacher
#14 Largest Private Schools in South Dakota
St. Mary Catholic School
Diocesan school · Grades Pre-K–12
222 students
Dell Rapids, SD
B-Overall grade222 students14 students per teacher
#15 Largest Private Schools in South Dakota
James Valley Christian School
Christian school (nondenominational) · Grades Pre-K–12
208 students
Huron, SD
BOverall grade208 students10 students per teacher
#16 Largest Private Schools in South Dakota
Aberdeen Christian School
Christian school (nondenominational) · Grades Pre-K–12
206 students
Aberdeen, SD
BOverall grade206 students8 students per teacher
#17 Largest Private Schools in South Dakota
St. Michael School
Diocesan school · Grades Pre-K–6
187 students
Sioux Falls, SD
BOverall grade187 students10 students per teacher
#18 Largest Private Schools in South Dakota
Calvary Christian School
Baptist school · Grades Pre-K–5
186 students
Rapid City, SD
BOverall grade186 students11 students per teacher
#19 Largest Private Schools in South Dakota
Roncalli Elementary School
Parish school · Grades 2–5
169 students
Aberdeen, SD
B-Overall grade169 students11 students per teacher
#20 Largest Private Schools in South Dakota
St. Martins Lutheran School
Lutheran (Wisconsin Synod) school · Grades Pre-K–8
164 students
Watertown, SD
B-Overall grade164 students16 students per teacher
#21 Largest Private Schools in South Dakota
Mitchell Christian School
Christian school (nondenominational) · Grades Pre-K–12
147 students
Mitchell, SD
BOverall grade147 students10 students per teacher
#22 Largest Private Schools in South Dakota
Great Plains Lutheran High School
Lutheran (Wisconsin Synod) school · Grades 9–12
137 students
Watertown, SD
BOverall grade137 students11 students per teacher
#23 Largest Private Schools in South Dakota
Zion Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–5
135 students
Rapid City, SD
BOverall grade135 students15 students per teacher
#24 Largest Private Schools in South Dakota
St. Joseph Indian School
Independent Catholic school · Grades 1–8
134 students
Chamberlain, SD
B+Overall grade134 students7 students per teacher
From official public records, updated October 2026.