The Orthodox Church in America (OCA) is an autocephalous (self governing) Orthodox Church, granted this status in 1970 from the Russian Orthodox Church. The OCA is in the USA, Canada and Mexico and in OCA churches the faithful are able to worship God through the Divine Liturgy, the ancient form of worship used in the whole of Eastern Orthodoxy.

Parishes in the OCA have been some of the first to celebrate the Divine Liturgy in the English language making the worship of the Orthodox Church accessible to all.

Orthodoxy in North America can be traced initially to a group of Russian monks who travelled by foot over eight thousand miles in 1793-1794 to reach what is present day Alaska (a Russian Colony at the time). Since then Orthodoxy has had a small but significant foothold in the continent. Most churches were founded by ethnic communities who brought their faith with them from the Old World. Today in many OCA parishes one finds a mixture of people who have a family history of membership in the Orthodox Church alongside many people who discovered Orthodoxy in their lives and joined the Church by themselves or with their families. Many leaders of the Orthodox Church, including Metropolitan Tikhon, the Presiding Bishop (pictured center, above) are adult converts to the faith.

Holy Assumption Orthodox Church is a part of the OCA and has been since its founding.