For the 2026 school year, there are 5 private schools serving 585 students in Watertown, SD (there are 10 public schools, serving 3,788 public students). 13% of all K-12 students in Watertown, SD are educated in private schools (compared to the SD state average of 9%).
The top-ranked private school in Watertown, SD is Imaculate Conception.
100% of private schools in Watertown, SD are religiously affiliated (most commonly Wisconsin Evangelical Lutheran Synod and Catholic).
Top-Ranked Watertown Private Schools (2026)
School
Location
Quick Facts
Imaculate Conception
(Catholic)
109 3rd St Se
Watertown, SD 57201
(605) 886-3883
Watertown, SD 57201
(605) 886-3883
Gr: PK-6 | 158 students Tuition listed
Great Plains Lutheran High School
(Wisconsin Evangelical Lutheran Synod)
1200 Luther Ln NE
Watertown, SD 57201
(605) 886-0672
Watertown, SD 57201
(605) 886-0672
Gr: 9-12 | 133 students
St. Martins Lutheran School
(Wisconsin Evangelical Lutheran Synod)
1200 2nd St Ne
Watertown, SD 57201
(605) 886-4976
Watertown, SD 57201
(605) 886-4976
Gr: PK-8 | 227 students Avg. class size: 19 students Sports: 5 | Extracurrculars: 1 Tuition listed
Trinity Lutheran School
(Other Lutheran)
1800 E Kemp Ste 2
Watertown, SD 57201
(605) 882-3224
Watertown, SD 57201
(605) 882-3224
Gr: 2-8 | 7 students
Watertown Christian School
(Christian)
15 12th Avenue Ne
Watertown, SD 57201
(605) 882-0949
Watertown, SD 57201
(605) 882-0949
Gr: K-8 | 60 students
Overview
This Town (Watertown)
This State (SD)
# Schools
5 Schools
Student Body:
# Students
585 Students
15,075 Students
% Average Students of Color
5%
21%
Academics and Faculty:
# Teachers
51 Teachers
1,229 Teachers
Average Student-Teacher Ratio
11:1
12:1
% Average Faculty w/Advanced Degree
30%
34%
Average Class Size
19 students
15 students
Tuition and Acceptance Rate:
Average Yearly Tuition Cost
$2,415
$6,448
Students by Ethnicity:
Diversity Score
0.38
0.59
# American Indian Students
n/a
1,727 Students
% American Indian Students
n/a
11%
# Asian Students
4 Students
161 Students
% Asian Students
1%
1%
# Hispanic Students
11 Students
468 Students
% Hispanic Students
2%
3%
# Black Students
11 Students
245 Students
% Black Students
2%
2%
# White Students
448 Students
9,019 Students
% White Students
76%
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
111 Students
3,562 Students
% of Others Students
19%
23%
All Ethnic Groups
Extracurriculars and Sports:
Average Number of Extracurriculars
1 extracurriculars
8 extracurriculars
Average Number of Sports
5 sports
7 sports
Frequently Asked Questions
What are the top-ranked private schools in Watertown, SD?
The top-ranked private schools in Watertown, SD is Imaculate Conception.
How many private schools are located in Watertown?
5 private schools are located in Watertown.
How diverse are private schools in Watertown?
Watertown private schools are approximately 5% minority students, which is lower than the South Dakota private school average of 21%.
What percentage of students in Watertown go to private school?
13% of all K-12 students in Watertown are educated in private schools (compared to the SD state average of 9%).
What percentage of private schools are religiously affiliated in Watertown?
100% of private schools in Watertown are religiously affiliated (most commonly Wisconsin Evangelical Lutheran Synod and Catholic).
Which private schools in Watertown are often viewed compared to one another?
Popular comparisons of private schools in Watertown include: Imaculate Conception vs. Watertown Christian School, St. Martins Lutheran School vs. Watertown Christian School, Watertown Christian School vs. Imaculate Conception
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