Omicron Delta Kappa
（重定向自ODK）
Omicron Delta Kappa (ΟΔΚ), also known as The Circle and ODK, is a national leadership honor society in the United States. It was founded December 3, 1914, at Washington and Lee University in Lexington, Virginia, by 15 student and faculty leaders. Chapters, known as circles, are located on more than 300 college campuses. The society recognizes achievement in the five areas of scholarship; athletics; campus and community service, social or religious activities, and campus government; journalism, speech and the mass media; and creative and performing arts. On some campuses, the local circle of ΟΔΚ can be a quasi-secret society in regard to the way its members are selected and kept secret for a period of time.