There are three [[seminary|seminaries]] operated by the OCA: [[St. Tikhon's Orthodox Theological Seminary (South Canaan, Pennsylvania)|St. Tikhon's Orthodox Theological Seminary]] (founded 1937), [[St. Vladimir's Orthodox Theological Seminary (Crestwood, New York)|St. Vladimir's Orthodox Theological Seminary]] (founded 1938), and [[St. Herman's Orthodox Theological Seminary (Kodiak, Alaska)|St. Herman's Orthodox Theological Seminary]] (founded 1973). All three educate seminarians from multiple Orthodox jurisdictions, including those outside North America.
Altogether, estimates of OCA faithful number from 29,000 to 115,000 to 1 million, depending on the report cited and method used for counting.[http://hirr.hartsem.edu/research/quick_question17.html] The number of new parishes founded from 1990 to 2000 rose the overall parish number by about 12%, and new membership has been fairly equally divided between new immigrants, children of existing members, and converts to the faith. Overall, however, the trend during that decade held the population of OCA faithful in neither increase nor decline, but remaining steady.[http://hirr.hartsem.edu/research/tab2.pdf]