The Antiochian Orthodox Christian Archdiocese of North America (AOCANA), often referred to in North America as simply the Antiochian Archdiocese, is the jurisdiction of the Greek Orthodox Church of Antioch in the United States and Canada. Originally under the care of the Russian Orthodox Church, the Syro-Levantine Eastern Orthodox Christian immigrants to the United States and Canada were granted their own jurisdiction under the Church of Antioch in the wake of the Bolshevik Revolution. Internal conflicts divided the Antiochian Orthodox faithful into two parallel archdioceses — those of New York and Toledo — until 1975, when Metropolitan Philip (Saliba) became the sole archbishop of the reunited Antiochian Archdiocese. By 2014, the archdiocese had grown to over 275 parish churches.

The Greek Orthodox Patriarchate of Antioch, also known as the Antiochian Orthodox Church and legally as the Rūm Orthodox Patriarchate of Antioch and All the East, is an autocephalous Greek Orthodox church within the wider communion of Eastern Orthodox Christianity that originates from the historical Church of Antioch. Headed by the Greek Orthodox patriarch of Antioch, it considers itself the successor to the Christian community founded in Antioch by the Apostles Peter and Paul. It is one of the largest Christian denominations of the Middle East, alongside the Copts of Egypt and the Maronites of Lebanon.