The Roman Catholic Diocese of Ningbo/Ningxian (Latin: Nimpuovensis, Chinese: 寧波, 寧縣) is a diocese located in the city of Ningbo (Zhejiang) in the ecclesiastical province of Hangzhou in China.

The diocese has two cathedral churches but only one has the seat of the bishop.

The other cathedral is the one dedicated to the Assumption of Mary which was rebuilt from 1995–2000.

The Cathedral of the Sacred Heart was destroyed in a fire on July 28, 2014.

This article on a Roman Catholic diocese in China is a stub.