Phi Delta Kappa International (also known as PDK or PDK International) is a US professional organization for educators. Its main office is in Arlington, Virginia. It was founded on January 24, 1906.
PDK is governed by an International Board, who are elected by professional PDK members. The association abides by the Constitution and Bylaws of PDK International.
Phi Delta Kappa began at Indiana University on January 24, 1906 in the formal creation of a chapter under the name Pi Kappa Mu. By 1910, the organization had a total of three chapters. On March 1, 1910, Pi Kappa Mu, Phi Delta Kappa (which had been organized at Columbia University on March 13, 1908) and Nu Rho Beta (which had been organized at University of Missouri on February 23, 1909) amalgamated under the name Phi Delta Kappa. Prior to amalgamation, Phi Delta Kappa had also branched out to include two other chapters.
Phi Delta Kappan is a professional journal for education, published by Phi Delta Kappa International, since 1915.