Community High School District 155 School Calendar 2026-2027

At a Glance

CSD is a suburban school district with 5 schools. Community High School District 155 was established on December 6, 1919, serves communities approximately 45 miles northwest of downtown Chicago, and operates four comprehensive high schools serving grades 9–12. The district has said a complete 2026-2027 calendar — including early dismissal dates and teacher workdays — will be published soon. This calendar includes 1 early-release or half day — useful to know when planning childcare.

Source: Community High School District 155

Also known as CSD.

Schools in Community High School District 155

Cary-Grove Community High School (High)
Crystal Lake Central High School (High)
Crystal Lake South High School (High)
Prairie Ridge High School (High)
Haber Oaks Campus (High)

Community High School District 155 2026-2027 School Calendar

All schools

2026-12-21 to 2027-01-01 — Winter Break - No School (closed)
2027-01-04 — Institute Day - No Classes (closed)
2027-01-05 — Institute Day - No Classes (closed)
2027-01-06 — First Day of School (Second Semester) (in session)
2027-01-18 — Martin Luther King Jr. Day - No School (closed)
2027-02-15 — Presidents' Day - No School (closed)
2027-05-18 to 2027-05-19 — Graduation - All Schools - 10:00 a.m. (in session)
Date to be confirmed — Late Start Monday (recurring) (partial)