Ontario Progressive Montessori School in Ontario, CA, enrolls 14 students in a nonsectarian Montessori program serving preschool through first grade in a midsize city community.
The school maintains a student–teacher ratio of 14:1 with one full–time teacher supporting early childhood education.
Founded with a focus on Montessori methods, the school holds membership in the American Montessori Society and other religious school associations while maintaining a nonsectarian orientation.
The student body is composed of 80% students of color, reflecting local community diversity in its early learning environment.
As a California K–1 private school, Ontario Progressive Montessori School provides education in a city setting, offering a small enrollment size suited for focused early childhood instruction.
Quick Facts (2026)
- School Type: Montessori School
- Grades: Prekindergarten-1
- Enrollment: 14 students
- Application Deadline: None / Rolling
- Source: National Center for Education Statistics (NCES)
School Overview
School Type
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades Prekindergarten-1
Student Body
Total Students
14 students
Student Body Type
Co-ed
% Students of Color
80%
State avg.: 52%
Students by Grade
Academics and Faculty
Total Classroom Teachers
1 teacher
Student-Teacher Ratio
14:1
National avg.:
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Source: National Center for Education Statistics (NCES)
Frequently Asked Questions
When is the application deadline for Ontario Progressive Montessori School?
The application deadline for Ontario Progressive Montessori School is rolling (applications are reviewed as they are received year-round).
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People that viewed Ontario Progressive Montessori School also viewed these schools: International Montessori School, Carden Arbor View School, Kiddie Academy, Foothill Country Day School and Western Christian School.
The nearest high school and elementary school to Ontario Progressive Montessori School is Ontario Christian School (0.8 miles away)
The nearest preschool is Mount Zion Christian School (0.4 miles away)
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International Montessori School
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(909) 684-8272
Montclair, CA 91763
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3.6 miles
Gr: 1-7 | 35 students Avg. class size: 21 students Tuition listed
1530 North San Antonio Ave
Upland, CA 91786
(909) 982-9919
Upland, CA 91786
(909) 982-9919
4.8 miles
Gr: K-8 | 175 students Avg. class size: 20 students Sports: 5 | Extracurrculars: 10 Tuition & acceptance rate listed
Kiddie Academy
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663 E Foothill Blvd
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(909) 621-5112
Claremont, CA 91711
(909) 621-5112
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Gr: PK-1 | 160 students
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Claremont, CA 91711
(909) 626-5681
5.5 miles
Gr: NS-8 | 438 students Avg. class size: 20 students Sports: 7 | Extracurrculars: 10 Tuition & acceptance rate listed
Western Christian School
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Claremont, CA 91711
(909) 624-8291
Claremont, CA 91711
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5.8 miles
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Claremont, CA 91711
(909) 621-5112
Claremont, CA 91711
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Gr: PK-1 | 160 students
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(909) 626-5681
Claremont, CA 91711
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Mount Zion Christian School
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224 W California St
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Ontario, CA 91762
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Inland Conservatory For The Performing Arts School
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2140 S Euclid Ave
Ontario, CA 91762
(909) 983-5007
Ontario, CA 91762
(909) 983-5007
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Gr: NS-PK
322 W D St
Ontario, CA 91762
(909) 984-9123
Ontario, CA 91762
(909) 984-9123
1.2 miles
Gr: K-8 | 304 students Avg. class size: 26 students Sports: 4 | Extracurrculars: 7 Tuition & acceptance rate listed
School
Location
Miles
Quick Facts
Ontario Christian School
(Christian)
1907 S Euclid Ave
Ontario, CA 91762
(909) 984-1756
Ontario, CA 91762
(909) 984-1756
0.8 miles
Gr: PK-12 | 1,428 students Tuition & acceptance rate listed
Inland Conservatory For The Performing Arts School
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104 W C St
Ontario, CA 91762
(800) 419-5216
Ontario, CA 91762
(800) 419-5216
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Gr: PK-12 | 54 students
11255 Central Ave.
Ontario, CA 91762
(909) 999-0025
Ontario, CA 91762
(909) 999-0025
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Stone Ridge Academy
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Upland, CA 91786
(909) 581-8568
Upland, CA 91786
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100 West 9th Street
Upland, CA 91786
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Upland, CA 91786
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Location
Miles
Quick Facts
Ontario Christian School
(Christian)
1907 S Euclid Ave
Ontario, CA 91762
(909) 984-1756
Ontario, CA 91762
(909) 984-1756
0.8 miles
Gr: PK-12 | 1,428 students Tuition & acceptance rate 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
1.1 miles
Gr: PK-12 | 54 students
322 W D St
Ontario, CA 91762
(909) 984-9123
Ontario, CA 91762
(909) 984-9123
1.2 miles
Gr: K-8 | 304 students Avg. class size: 26 students Sports: 4 | Extracurrculars: 7 Tuition & acceptance rate listed
11255 Central Ave.
Ontario, CA 91762
(909) 999-0025
Ontario, CA 91762
(909) 999-0025
2 miles
Gr: PK-12 | 236 students Avg. class size: 12 students Sports: 12 | Extracurrculars: 5 Tuition & acceptance rate listed
Our Lady Of Lourdes School
(Catholic)
5303 Orchard St
Montclair, CA 91763
(909) 621-4418
Montclair, CA 91763
(909) 621-4418
2.4 miles
Gr: PK-8 | 236 students
School
Location
Miles
Quick Facts
Mount Zion Christian School
Daycare / Preschool (Christian)
224 W California St
Ontario, CA 91762
(909) 988-2280
Ontario, CA 91762
(909) 988-2280
0.4 miles
Gr: PK-K | 12 students
Ontario Christian School
(Christian)
1907 S Euclid Ave
Ontario, CA 91762
(909) 984-1756
Ontario, CA 91762
(909) 984-1756
0.8 miles
Gr: PK-12 | 1,428 students Tuition & acceptance rate 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
1.1 miles
Gr: PK-12 | 54 students
Ontario KinderCare ![Ontario KinderCare Photo - Ontario KinderCare Front]( "Ontario KinderCare Photo - Ontario KinderCare Front")
Daycare / Preschool
2140 S Euclid Ave
Ontario, CA 91762
(909) 983-5007
Ontario, CA 91762
(909) 983-5007
1.1 miles
Gr: NS-PK
Christ Lutheran Preschool And Kindergarten
Daycare / Preschool (Other Lutheran)
5500 Francis Ave
Chino, CA 91710
(909) 627-1433
Chino, CA 91710
(909) 627-1433
1.9 miles
Gr: PK-K | 28 students
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Miles
Quick Facts
(Math: 21% | Reading: 34%)
Rank:
Rank:
4/
Bottom 50%10
1120 South Euclid Ave.
Ontario, CA 91762
(909) 984-5119
Ontario, CA 91762
(909) 984-5119
0.2 miles
Gr: K-6 | 572 students Student-Teacher Ratio: 21:1 Minority enrollment: 99%
(Math: 33% | Reading: 42%)
Rank:
Rank:
6/
Top 50%10
1450 South Sultana Ave.
Ontario, CA 91761
(909) 986-8577
Ontario, CA 91761
(909) 986-8577
0.5 miles
Gr: 7-8 | 510 students Student-Teacher Ratio: 16:1 Minority enrollment: 98%
(Math: 34% | Reading: 33%)
Rank:
Rank:
5/
Bottom 50%10
715 West Francis St.
Ontario, CA 91762
(909) 984-1759
Ontario, CA 91762
(909) 984-1759
0.8 miles
Gr: K-6 | 641 students Student-Teacher Ratio: 24:1 Minority enrollment: 97%
(Math: 21% | Reading: 60%)
Rank:
Rank:
6/
Top 50%10
901 West Francis St.
Ontario, CA 91762
(909) 988-7411
Ontario, CA 91762
(909) 988-7411
0.9 miles
Gr: 9-12 | 1,994 students Student-Teacher Ratio: 22:1 Minority enrollment: 98%
(Math: 25% | Reading: 40%)
Rank:
Rank:
5/
Bottom 50%10
1845 South Sultana Ave.
Ontario, CA 91761
(909) 986-1215
Ontario, CA 91761
(909) 986-1215
0.9 miles
Gr: K-6 | 589 students Student-Teacher Ratio: 20:1 Minority enrollment: 96%
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