Italy is largely homogeneous linguistically and religiously but is various culturally, economically, and politically. Italy has the fifth-highest population density in Europe--about 200 persons per square kilometer.Minority groups are small, the largest being the German-speaking people of Bolzano Province and the Slovenes around Trieste. Other groups comprise small communities of Albanian, Greek, Ladino, and French origin. Immigration has increased in recent years, while the Italian population is declining overall due to low birth rates. Although Roman Catholicism is the majority religion--85% of native-born citizens are nominally Catholic--all religious faiths are provided equal freedom before the law by the constitution.

The Roman Catholic Church's status in Italy has been determined, since its temporal powers ended in 1870, by a series of accords with the Italian Government. Under the Lateran Pacts of 1929, which were confirmed by the present constitution, the state of Vatican City is recognized by Italy as an independent, sovereign entity. While preserving that recognition, in 1984, Italy and the Vatican updated several provisions of the 1929 accords. Included was the end of Roman Catholicism as Italy's formal state religion.