Prato Cathedral, or Cathedral of Saint Stephen, is a Roman Catholic cathedral in Prato, Tuscany, Central Italy, from 1954 the seat of the Bishop of Prato, having been previously, from 1653, a cathedral in the Diocese of Pistoia and Prato. It is dedicated to Saint Stephen, the first Christian martyr.

Prato is a city and comune in Tuscany, Italy, and is the capital of the Province of Prato. The city lies in the northeast of Tuscany, at an elevation of 65 metres (213 ft), at the foot of Monte Retaia. With 195,213 inhabitants as of 1 January 2023, Prato is Tuscany's second largest city and the third largest in Central Italy.