Ninth grade
Knollwood residents are served by Lake Bluff School District 65, and Lake Forest High School District 115. Public school students receive their elementary education (Kindergarten through Fifth grade) at Lake Bluff Elementary School, middle school education (Sixth grade through Eighth grade) at Lake Bluff Middle School and high school education (Ninth grade through Twelfth grade) at Lake Forest High School. The defunct Lake Bluff West Elementary School (Intended for children living in Knollwood and western Lake Bluff) was also located in Knollwood. The school was constructed in 1962 and opened in 1963. In 1994, District 65 vacated the building, and it currently serves as headquarters for the Shields Township supervisor.