A Catechism of Christian Doctrine, Prepared and Enjoined by Order of the Third Council of Baltimore, or simply the Baltimore Catechism, was the national Catholic catechism for children in the United States, based on Robert Bellarmine's 1614 Small Catechism. The first such catechism written for Catholics in North America, it was the standard Catholic school text in the country from 1885 to the late 1960s. From its publication, however, there were calls to revise it, and many other catechisms were used during this period. It was officially replaced by the United States Catholic Catechism for Adults in 2004, based on the revised universal Catechism of the Catholic Church.

The Catechism of the Catholic Church is a reference work that summarizes the Catholic Church's doctrine. It was promulgated by Pope John Paul II in 1992 as a reference for the development of local catechisms, directed primarily to those responsible for catechesis and offered as "useful reading for all other Christian faithful". It has been translated into and published in more than twenty languages worldwide.