#1 Best Private High Schools in South Dakota
Red Cloud Indian School
Diocesan school · Grades K–12
Smaller classes than 84% of Catholic schools nationwide
Pine Ridge, SD
A+Overall grade435 students7 students per teacher
2026 lists
Best Private High Schools in South Dakota
Private high schools in South Dakota with the highest overall grades. Top 13 of 13 schools.
#2 Best Private High Schools in South Dakota
Dakota Christian School
Christian school (nondenominational) · Grades Pre-K–12
Serving families in Corsica since at least 2011
Corsica, SD
B+Overall grade94 students9 students per teacher
#3 Best Private High Schools in South Dakota
Aberdeen Christian School
Christian school (nondenominational) · Grades Pre-K–12
Smaller classes than 67% of Christian schools in South Dakota
Aberdeen, SD
BOverall grade206 students8 students per teacher
#4 Best Private High Schools in South Dakota
James Valley Christian School
Christian school (nondenominational) · Grades Pre-K–12
93% of graduates go to four-year colleges
Huron, SD
BOverall grade208 students10 students per teacher
#5 Best Private High Schools in South Dakota
Great Plains Lutheran High School
Lutheran (Wisconsin Synod) school · Grades 9–12
The smallest classes of any Christian school in Watertown
Watertown, SD
BOverall grade137 students11 students per teacher
#6 Best Private High Schools in South Dakota
Rapid City Catholic School System
Diocesan school · Grades Pre-K–12
One of the 3 largest Catholic schools in South Dakota
Rapid City, SD
BOverall grade650 students12 students per teacher
#7 Best Private High Schools in South Dakota
Roncalli Jr. & Sr. High School
Parish school · Grades 6–12
The smallest classes of any Catholic school in Aberdeen
Aberdeen, SD
B-Overall grade232 students11 students per teacher
#8 Best Private High Schools in South Dakota
Roncalli Primary School
Parish school · Grades Pre-K–12
One of the 3 largest Catholic schools in South Dakota
Aberdeen, SD
B-Overall grade482 students13 students per teacher
#9 Best Private High Schools in South Dakota
Sioux Falls Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
The largest of 30 Christian schools in South Dakota
Sioux Falls, SD
B-Overall grade1,382 students17 students per teacher
#10 Best Private High Schools in South Dakota
St. Mary Catholic School
Diocesan school · Grades Pre-K–12
90% of graduates go to four-year colleges
Dell Rapids, SD
B-Overall grade222 students14 students per teacher
#11 Best Private High Schools in South Dakota
Aberdeen Catholic Schools
Parish school · Grades Pre-K–12
One of the 3 largest Catholic schools in South Dakota
Aberdeen, SD
B-Overall grade482 students13 students per teacher
#12 Best Private High Schools in South Dakota
Sioux Falls Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–12
One of the 3 largest Christian schools in South Dakota
Sioux Falls, SD
B-Overall grade301 students13 students per teacher
#13 Best Private High Schools in South Dakota
Sioux Falls Catholic School
Parish school · Grades Pre-K–12
The largest of 24 Catholic schools in South Dakota
Sioux Falls, SD
B-Overall grade2,231 students22 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.