Wheeling Community Consolidated School District 21 (CCSD21) is a school district headquartered in Wheeling, Illinois in the Chicago metropolitan area.

[7] It serves most of Wheeling and surrounding communities, such as Buffalo Grove, Arlington Heights, Mount Prospect and Prospect Heights.

As of 2006, there are ten elementary schools in the district and three middle schools.

District 21 feeds secondary schools within Township High School District 214, such as Buffalo Grove High School and Wheeling High School.