For the 2026 school year, there are 11 private schools serving 2,311 students in Ontario, CA (there are 40 public schools, serving 26,270 public students). 8% of all K-12 students in Ontario, CA are educated in private schools (compared to the CA state average of 10%).
The top-ranked private schools in Ontario, CA include Orion International Academy, St. George Parish School, and Ontario Christian School.
The average acceptance rate is 93%, which is higher than the California private school average acceptance rate of 81%.
Top-Ranked Ontario Private Schools (2026)
School
Location
Quick Facts
11255 Central Ave.
Ontario, CA 91762
(909) 999-0025
Ontario, CA 91762
(909) 999-0025
Gr: PK-12 | 236 students Avg. class size: 12 students Sports: 12 | Extracurrculars: 5 Tuition & acceptance rate listed
Ontario Christian School
(Christian)
1907 S Euclid Ave
Ontario, CA 91762
(909) 984-1756
Ontario, CA 91762
(909) 984-1756
Gr: PK-12 | 1,428 student Tuition & acceptance rate listed
322 W D St
Ontario, CA 91762
(909) 984-9123
Ontario, CA 91762
(909) 984-9123
Gr: K-8 | 304 students Avg. class size: 26 students Sports: 4 | Extracurrculars: 7 Tuition & acceptance rate listed
San Antonio Christian School
(Seventh Day Adventist)
1722 E 8th St
Ontario, CA 91764
(909) 982-2301
Ontario, CA 91764
(909) 982-2301
Gr: K-8 | 52 students Avg. class size: 14 students Tuition listed
Inland Conservatory For The Performing Arts School
Special Program Emphasis
104 W C St
Ontario, CA 91762
(800) 419-5216
Ontario, CA 91762
(800) 419-5216
Gr: PK-12 | 54 students
Kids Club
Daycare / Preschool
1825 N Vineyard Ave
Ontario, CA 91764
(909) 985-7279
Ontario, CA 91764
(909) 985-7279
Gr: PK-K | 18 students
Montecito Baptist School
(Baptist)
2560 S Archibald Ave
Ontario, CA 91761
(909) 923-8455
Ontario, CA 91761
(909) 923-8455
Gr: K-12 | 76 students
Mount Zion Christian School
Daycare / Preschool (Christian)
224 W California St
Ontario, CA 91762
(909) 988-2280
Ontario, CA 91762
(909) 988-2280
Gr: PK-K | 12 students
Ontario Progressive Montessori School
Montessori School
328 W Phillips St
Ontario, CA 91762
(909) 988-7145
Ontario, CA 91762
(909) 988-7145
Gr: PK-1 | 14 students
Port View Preparatory
Special Education School
1460 S Milliken Ave
Ontario, CA 91761
(714) 463-6390
Ontario, CA 91761
(714) 463-6390
Gr: Inquire with school | 117 students
Overview
This Town (Ontario)
This State (CA)
# Schools
11 Schools
Student Body:
# Students
2,311 Students
665,722 Students
% Average Students of Color
48%
51%
Academics and Faculty:
# Teachers
162 Teachers
55,562 Teachers
Average Student-Teacher Ratio
14:1
12:1
% Average Faculty w/Advanced Degree
67%
59%
Average Class Size
17 students
17 students
Average Number of AP Courses
33 courses
15 courses
Average SAT score
1352
(Out of 1600)
1262
Tuition and Acceptance Rate:
Average Yearly Tuition Cost
$7,500
$18,024
Average Summer Program Cost
$350
$1,043
Average % on Financial Aid
23%
29%
Average Financial Aid Grant
$2,500
$8,935
Average Acceptance Rate
93%
81%
Average Endowment Size
$50 million
$34.01 million
Students by Ethnicity:
Diversity Score
0.73
0.74
# American Indian Students
15 Students
3,584 Students
% American Indian Students
1%
n/a
# Asian Students
220 Students
72,174 Students
% Asian Students
11%
11%
# Hispanic Students
500 Students
104,627 Students
% Hispanic Students
24%
16%
# Black Students
88 Students
30,466 Students
% Black Students
4%
5%
# White Students
873 Students
236,488 Students
% White Students
42%
37%
# Hawaiian Students
6 Students
5,515 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
373 Students
190,072 Students
% of Others Students
18%
30%
All Ethnic Groups
Extracurriculars and Sports:
Average Number of Extracurriculars
6 extracurriculars
9 extracurriculars
Average Number of Sports
8 sports
7 sports
Frequently Asked Questions
What are the top-ranked private schools in Ontario, CA?
The top-ranked private schools in Ontario, CA include Orion International Academy, St. George Parish School, and Ontario Christian School.
How many private schools are located in Ontario?
11 private schools are located in Ontario.
How diverse are private schools in Ontario?
Ontario private schools are approximately 48% minority students, which is lower than the California private school average of 51%.
What percentage of students in Ontario go to private school?
8% of all K-12 students in Ontario are educated in private schools (compared to the CA state average of 10%).
Recent Articles
Financial Aid 101 for Private School Families 2026
Guide to private school financial aid in 2026, with current costs, key planning timelines and practical steps parents need to maximize aid options.
Why Extracurricular Activities Matter in 2026
Discover why extracurricular activities remain essential in 2026, with updated research, costs, and admissions insights for parents and students.
How to Appeal for Financial Aid After Admission
Learn how to appeal for financial aid after admission to a private school, with expert steps, timelines, and 2026 updates for families.
