St. Clair County schools welcomed 39,912 students in 2022-23 school year

St. Clair County schools welcomed 39,912 students in the 2022-23 school year, according to the Illinois State Board of Education.

This is a decrease of 1.1% from the previous school year, when there were 40,341 students enrolled in the county.

St. Clair County had the eighth highest enrollment numbers in the state.

Of all the students welcomed at the time, 51.4% identified as male, and 48.6% as female.

The most represented ethnicity among St. Clair County students was white, making up about 47.2% of all the students.

Within St. Clair County, O’Fallon High School had the highest enrollment in the school year, welcoming 2,479 students.

In 2022, Illinois had almost 2 million students enrolled in nearly 4,000 schools. There was roughly one teacher for every 15 students, slightly better than the national average of 1:16.

K-12 enrollment has been declining in Illinois for many years, reflecting the state’s demographic changes. Combined public and private K-12 enrollment dropped 3% between the 2019–20 and 2020–21 school years (60,900 students), far more than the typical 0.5% to 1.5% annual enrollment declines in Illinois over the last five years.