The Cambridge Association was an influential group of Congregational clergymen in the Boston area who regularly met in the Harvard College library between 1690 and 1697. The minutes of their meetings shed important light on the oft-debated question of the Puritan ministers influence on the witchcraft trials.

Congregationalism in the United States consists of Protestant churches in the Reformed tradition that have a congregational form of church government and trace their origins mainly to Puritan settlers of colonial New England. Congregational churches in other parts of the world are often related to these in the United States due to American missionary activities.