Total enrollment
25,478
-4,585 (-15%) vs SY 2017-18
40 schools in Ontario
California · Public K-12
Ontario's public schools, 40 in all, serve about 25,478 K-12 students inside California, averaging 637 per campus.
7-year change in Ontario
SY 2017-18 vs SY 2024-25School count
38
-6 (-14%) vs SY 2017-18
% White
5%
was 9%
% Hispanic
81%
was 81%
% Black
5%
was 4%
% Asian
6%
was 3%
Source: NCES Common Core of Data, enrollment-weighted demographic averages
About Ontario
Ontario is a high-population California city in terms of public-school footprint, with 40 schools and 25,478 students total.
In terms of grade levels, the city is built around 27 elementary, 6 middle, and 7 high.
Average school size in Ontario is around 637 students, 10% above the California average of about 578.
Trend over the past 7 years. Across the same 7-year window, public-school enrollment decreased 15%: 30,063 students in SY 2017-18 versus 25,478 in SY 2024-25. Over that span, Ontario closed 6 schools, going from 44 to 38. Demographically, the White share of enrollment shrank from 9% to 5%.
On this page, the community for Ontario discusses sports rivalries, cross-district programs, and shared facilities. Discussions cut across districts, schools, and grade levels.