The Archdiocese of Lucca is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Italy. The diocese dates back as a diocese to at least the 4th century; it became an archdiocese in 1726. The seat of the archbishop is in Lucca, in the cathedral of S. Martino. It is not a metropolitan see, has no suffragan dioceses, and is immediately subject (exempt) to the Holy See (Papacy).

Lucca is a city and comune in Tuscany, Central Italy, on the Serchio River, in a fertile plain near the Ligurian Sea. The city has a population of about 89,000, while its province has a population of 383,957.