Membership is obtained by chapter invitation or through self-nomination.
Chapters may specify additional requirements for membership, as long as they are not contrary to the constitution of Phi Delta Kappa. Individuals wishing to become international at-large members can apply directly to Phi Delta Kappa International. Eligibility for such membership terminates when a holder moves into one of the geographic areas listed above. Chapters that desire to do so can offer an annual student membership to college of university undergraduate students whose coursework is leading toward educator certification. This is a chapter membership only, subject to renewal on an annual basis at the chapter's discretion.