New Melleray Abbey is a Trappist monastery located near Dubuque, Iowa. The abbey is located about 15 miles southwest of Dubuque and is in the Archdiocese of Dubuque. Currently the Abbey is home to about 16 monks. Several of the monks work in their business, Trappist Caskets, and some of their food comes from the garden behind the Abbey. The abbot of the monastery is Dom Brendan Freeman, who was appointed by Father Immediate McCarthy in December 2021 after consulting the community.

The Trappists, officially known as the Order of Cistercians of the Strict Observance and originally named the Order of Reformed Cistercians of Our Lady of La Trappe, are a Catholic religious order of cloistered monastics that branched off from the Cistercians. They follow the Rule of Saint Benedict and have communities of both monks and nuns that are known as Trappists and Trappistines, respectively. They are named after La Trappe Abbey, the monastery from which the movement and religious order originated. The movement first began with the reforms that Abbot Armand Jean le Bouthillier de Rancé introduced in 1664, later leading to the creation of Trappist congregations, and eventually the formal constitution as a separate religious order in 1892.