The Archdiocese of Vercelli is a Latin Metropolitan archdiocese of the Catholic Church in northern Italy, one of the two archdioceses which, together with their suffragan dioceses, form the ecclesiastical region of Piedmont.

Vercelli Cathedral is the principal church of the city of Vercelli in Piedmont, Italy, and the cathedral of the Archdiocese of Vercelli. It is dedicated to Saint Eusebius of Vercelli, the first bishop.