The Diocese of Xianxian/Síenhsíen (Latin: Scienscienen(sis), Chinese: 獻縣) is a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church in China. Its episcopal see is the city of Xianxian. The diocese is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Beijing.

• May 30, 1856: Established as Apostolic Vicariate of Southeastern Chi-Li 直隸東南 from the Diocese of Beijing 北京
• December 3, 1924: Renamed as Apostolic Vicariate of Xianxian 獻縣
• April 11, 1946: Promoted as Diocese of Xianxian 獻縣

• Bishops of Xianxian
  • Bishop Joseph Li Liangui (March 20, 2000 – Present)
  • Bishop François-Xavier Zhao Zhen-sheng, S.J. (趙振聲) (April 11, 1946 – October 15, 1968)
• Vicars Apostolic of Xianxian 獻縣
  • Bishop François-Xavier Zhao Zhen-sheng, S.J. (趙振聲) (December 2, 1937 – April 11, 1946)
  • Bishop Henri Lécroart, S.J. (劉欽明) (December 23, 1919 – December 2, 1936)
• Vicars Apostolic of Southeastern Chi-Li 直隸東南
  • Bishop Henri Maquet, S.J. (馬澤軒) (July 20, 1901 – December 23, 1919)
  • Bishop Henri-Joseph Bulté, C.M. (步天衢) (March 14, 1880 – October 14, 1900)
  • Bishop Edouard-Auguste Dubar, S.J. (杜巴爾) (September 9, 1864 – July 1, 1878)
  • Bishop Adrien-Hippolyte Languillat, S.J. (郎怀仁) (May 30, 1856 – September 9, 1864)

• GCatholic.org
• Catholic Hierarchy
• Diocese website (Chinese) (currently censored)
• UCAN Diocese Profile

• Imprimerie de la Mission Catholique (Sienhsien)

38°12′N 116°07′E / 38.200°N 116.117°E / 38.200; 116.117