The Italian nobility (Italian: Nobiltà italiana) comprised individuals and their families of the Italian Peninsula, and the islands linked with it, recognized by the sovereigns of the Italian city-states since the Middle Ages, and by the kings of Italy after the unification of the region into a single state, the Kingdom of Italy.

Nobles had a specific legal status and held most of the wealth and various privileges denied to other classes, mainly politicians. In most of the former Italian pre-unification states, it was the only class that had access to high-level government positions. They represented the most distinguished positions of the peninsular nations in addition to the Catholic Church for several centuries. There were varying forms of nobility over time in their respective regions.

From the Medieval Period until the nineteenth century in March 1861, Italy was not a single unified sovereign state. It was a peninsula consisting of several separate kingdoms, duchies, and other minor principalities, with many reigning dynasties. These were often related maritally to both the neighbouring Italian states and other major and minor European dynasties.

Recognition of Italian nobility ceased with the creation of the Italian Republic in 1946. Although many titles still exist, they are used as a matter of social courtesy, but are not recognised under Italian law. A limited number of noble titles granted by the pope were formally acknowledged according to Article 42 of the Lateran Treaty until its abrogation in 1985.

Before the Unification of Italy in 1861, the Italian peninsula was home to numerous noble families. Among the most prominent were the Sforza of Milan and the Medici of Florence, both of whom played a significant role in fostering the Rinascimento (Italian Renaissance) in their respective regions. Perhaps the most politically consequential noble lineage was the House of Savoy, whose leadership was instrumental in the establishment of the Kingdom of Italy in the 19th century.

From the 15th to the 18th centuries, the Italian peninsula was home to a wide array of noble families, many of whom rose to prominence through judicial appointments, election to regional senates, or high-ranking positions within the Roman Catholic Church.

In addition to newly elevated nobility, many families had held noble status for generations, sometimes spanning centuries. Writing in the 19th century, the historian Leopold von Ranke described the longstanding noble lineages in Rome:

In the middle of the 17th century there were computed to be fifty noble families in Rome of three hundred years' standing, thirty-five of two hundred, and sixteen of one hundred years. None were permitted to claim a more ancient descent, or were generally traced to an obscure, or even a low origin.