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 official cathedral is the one dedicated to the Sacred Heart of Jesus but which used to be dedicated to Our Lady of Sorrow. The other cathedral is the one dedicated to the Assumption of Mary which was rebuilt from 1995–2000. The latter church is a former cathedral.