The club is the most important level of the Circle K organization. Each club is expected to maintain a membership of at least 20 students, which ensures the club will continue to exist year after year. There is no maximum limit to the size of the club.

These are the general requirements for Circle K membership: Willingness to serve, commitment to humankind, and dedication and adherence to the organization’s ideals.

To find Circle K clubs around the world one can search the CKI Club Locator found here. The Club Locator provides direct links to club web sites (if they exist) and direct links to our on-line membership interest form that carry the chosen club's information to that form. Access the on-line membership interest form directly to choose three or more prospective colleges in which to express interest.

Former Key Club members are invited to join Circle K and can accept the invitation (read the invitation) by completing the membership interest form.