For the 2026 school year, there are 2 private schools serving 109 students in Lake County, SD (there are 15 public schools, serving 2,041 public students). 5% of all K-12 students in Lake County, SD are educated in private schools (compared to the SD state average of 9%).
The top-ranked private school in Lake County, SD is St. Thomas School.
The average acceptance rate is 100%, which is higher than the South Dakota private school average acceptance rate of 76%.
Top-Ranked Lake County Private Schools (2026)
School
Location
Quick Facts
St. Thomas School
(Catholic)
401 N Van Eps Ave
Madison, SD 57042
(605) 256-4419
Madison, SD 57042
(605) 256-4419
Gr: PK-5 | 74 students Tuition listed
Madison Christian School
(Christian)
45369 234th St
Madison, SD 57042
(605) 427-0109
Madison, SD 57042
(605) 427-0109
Gr: PK-4 | 35 students Tuition & acceptance rate listed
Overview
This County (Lake County)
This State (SD)
# Schools
2 Schools
Student Body:
# Students
109 Students
15,075 Students
% Average Students of Color
14%
21%
Academics and Faculty:
# Teachers
8 Teachers
1,229 Teachers
Average Student-Teacher Ratio
14:1
12:1
Tuition and Acceptance Rate:
Average Yearly Tuition Cost
$2,600
$6,448
Average Acceptance Rate
100%
76%
Students by Ethnicity:
Diversity Score
0.50
0.59
# American Indian Students
n/a
1,727 Students
% American Indian Students
n/a
11%
# Asian Students
n/a
161 Students
% Asian Students
n/a
1%
# Hispanic Students
5 Students
468 Students
% Hispanic Students
5%
3%
# Black Students
n/a
245 Students
% Black Students
n/a
2%
# White Students
35 Students
9,019 Students
% White Students
32%
59%
# Hawaiian Students
n/a
99 Students
% Hawaiian Students
n/a
1%
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
69 Students
3,562 Students
% of Others Students
63%
23%
All Ethnic Groups
Extracurriculars and Sports:
Frequently Asked Questions
What are the top-ranked private schools in Lake County, SD?
The top-ranked private schools in Lake County, SD is St. Thomas School.
How many private schools are located in Lake County?
2 private schools are located in Lake County.
What percentage of students in Lake County go to private school?
5% of all K-12 students in Lake County are educated in private schools (compared to the SD state average of 9%).
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