Serving 585 students in grades Kindergarten-5, Ontario Center ranks in the bottom 50% of all schools in California for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 19% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 22% (which is lower than the California state average of 47%).
The student-teacher ratio of 20:1 is lower than the California state level of 21:1.
Minority enrollment is 89% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- Grades: Kindergarten-5
- Enrollment: 585 students
- Student-Teacher Ratio: 20:1
- Minority Enrollment: 89%
- Overall Testing Rank: Bottom 50% in CA
- Math Proficiency: 19% (Btm 50%)
- Reading Proficiency: 22% (Btm 50%)
- Science Proficiency: 10-14% (Btm 50%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
School Overview
Ontario Center's student population of 585 students has grown by 8% over five school years.
The teacher population of 29 teachers has grown by 16% over five school years.
Grades Offered
Grades Kindergarten-5
Total Students
585 students
Total Classroom Teachers
29 teachers
School Rankings
Ontario Center ranks within the bottom 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Ontario Center is 0.66, which is more than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#7787 out of 9523 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
19%
34%
Reading/Language Arts Test Scores (% Proficient)
22%
47%
Science Test Scores (% Proficient)
10-14%
29%
Student-Teacher Ratio
20:1
21:1
Asian
6%
12%
Hispanic
52%
56%
Black
24%
5%
White
11%
20%
Hawaiian
1%
n/a
Two or more races
6%
6%
All Ethnic Groups
Chronically Absent Students
(22-23)33.7%
27.7%
Eligible for Free Lunch
63%
54%
Eligible for Reduced Lunch
12%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Ontario Center's ranking?
Ontario Center is ranked #7787 out of 9,523 schools, which ranks it among the bottom 50% of public schools in California.
What percent of students have achieved state testing proficiency in math and reading?
19% of students have achieved math proficiency (compared to the 34% CA state average), while 22% of students have achieved reading proficiency (compared to the 47% CA state average).
How many students attend Ontario Center?
585 students attend Ontario Center.
What is the racial composition of the student body?
52% of Ontario Center students are Hispanic, 24% of students are Black, 11% of students are White, 6% of students are Asian, 6% of students are Two or more races, and 1% of students are Hawaiian.
What is the student-teacher ratio of Ontario Center?
Ontario Center has a student ration of 20:1, which is lower than the California state average of 21:1.
What grades does Ontario Center offer ?
Ontario Center offers enrollment in grades Kindergarten-5
What school district is Ontario Center part of?
Ontario Center is part of Cucamonga Elementary School District.
School Reviews
Review Ontario Center. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
AI Report Cards: Should Schools Evaluate AI Use?
Explore whether schools should assess student AI use, the benefits, risks, and what responsible AI report cards could look like in 2026.
The Parent’s Guide to School Cell Phone Bans in 2026
Learn how school cell phone bans work in 2026, why districts are adopting them, and what parents should expect.
Parental Involvement in Public Schools: 2026 Update
Explore the latest 2026 trends, research, and strategies shaping parental involvement in public schools and student success.
