Total enrollment
17,640
-3,403 (-16%) vs SY 2017-18
34 schools in Ontario-Montclair
California · 17,640 students · 2 cities
Ontario-Montclair reports 34 public K-12 schools and approximately 17,640 students enrolled, per NCES, an average school size of 519.
7-year change in Ontario-Montclair
SY 2017-18 vs SY 2024-25School count
33
+1 (+3%) vs SY 2017-18
% White
3%
was 3%
% Hispanic
88%
was 90%
% Black
3%
was 2%
% Asian
3%
was 2%
Source: NCES Common Core of Data, enrollment-weighted demographic averages
About Ontario-Montclair
As a sparse district in California, Ontario-Montclair enrolls 17,640 students across 34 schools.
For a sense of the school types, Ontario-Montclair is made up of 28 elementary and 6 middle.
Per-school enrollment averages around 519 in this district, lower than the California typical of 578.
Trend over the past 7 years. Across the same 7-year window, public-school enrollment fell 16%: 21,043 students in SY 2017-18 versus 17,640 in SY 2024-25. Ontario-Montclair now counts 33 public schools, up from 32 in SY 2017-18.
In the discussion threads here, the community for Ontario-Montclair discusses enrollment trends, district policy changes, and bus-route updates. Posts come from current and former families, staff, and alumni.