Nomadelfia is an intentional community in Grosseto, Italy. It is composed of practising Catholics following a lifestyle inspired by the Acts of the Apostles, i.e. an attempted return to the early church. According to the Catholic Church, Nomadelfia is a parish of married families and lay people, and to the Italian state it is a private association of citizens.

The residents of Nomadelfi are not all members of the community; only after the age of 21 can someone decide to join. Nomadelfia does not use money, and those who do obtain income from outside the community pay into a central pot which helps provide for everyone.