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Crystal Lake South High School

For All Students. For Each Student.

School Information

School Information

 

 

Entrance of Crystal Lake South High School

Crystal Lake South High School opened in 1978, serving students from Crystal Lake and Lake in the Hills, and is located approximately 45 miles northwest of Chicago. 

Crystal Lake South High School consistently ranks among the top high schools nationally and in Illinois, and offers students a comprehensive 9-12 grade education with more than 200 courses to choose from.

In athletics, the Crystal Lake South Gators compete in the Valley Division of the Fox Valley Conference, offering students the chance to be part of a strong tradition of teamwork and school pride. Most recently, the school has captured state titles in boys’ soccer (2018, 2023), wrestling (2019), and baseball (2017). 

Beyond sports, students can explore their interests through a vibrant performing and fine arts program, along with more than 40 clubs and activities available. Students are given unique ways to get involved, connect, and make the most of their high school experience.

 

Illinois Report Card

Office Hours

During the School Year: Monday - Friday, 7:00 a.m. - 4:00 p.m. Summer Break, May 26 - July 31 : Monday - Thursday, 7:00 a.m. - 3:30 p.m. Friday (Closed)

Visitor Information

Visitors must have a scheduled appointment, provide a valid state-issued photo identification card, and sign in at the security desk. Please park in a designated visitor spot and enter through the main entrance.

Parking Information

The CLS student parking lot.

Due to limited space, only juniors and seniors may park in the student lot. A permit may be purchased for $150.00 for the entire school year. Permits are limited. Semester-only parking stickers will cost $75 per semester. Proceeds from parking sticker sales help the district maintain its parking lots.

Emergency, one-day parking privileges are available for $5.00 per day. Please see the dean’s secretary for details.

Visitor Parking

At the front of each D155 school, there are designated "visitor parking" signs that are available. Please check in at the front office after parking and be prepared to show a valid driver's license.