The Orthodox Church in America (OCA) is an Eastern Orthodox Christian church based in North America. The OCA is partly recognized as autocephalous and consists of more than 700 parishes, missions, communities, monasteries and institutions in the United States, Canada and Mexico.: 68  In 2011, it had an estimated 84,900 members in the United States. The OCA has its origins in a mission established by eight Russian Orthodox monks in Alaska, then part of Russian America, in 1794. This grew into a full diocese of the Russian Orthodox Church after the United States purchased Alaska from Russia in 1867. By the late 19th century, the Russian Orthodox Church had grown in other areas of the United States due to the arrival of immigrants from areas of Eastern and Central Europe, many of them formerly of the Eastern Catholic Churches ("Greek Catholics"), and from the Middle East. These immigrants, regardless of nationality or ethnic background, were united under a single North American diocese of the Russian Orthodox Church. More information...

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