The American Catholic Church in the United States is a Christian denomination that largely follows the practices of the Roman Catholic Church, but is not in communion with it.

It celebrates the same seven sacraments as the Roman Church, but does not require its priests to be celibate.

This church belongs to the family of the Old Catholic sects. Founded by The Most Reverend Lawrence J. Harms DD on June 13, 1999, the church is based in Frederick, Maryland. Harms leads the church, and holds the title of Presiding Archbishop.