Saint Rimbert (or Rembert) (Flanders, 830 – 11 June 888 in Bremen) was archbishop of Bremen-Hamburg from 865 until his death.
A monk in Turholt (Torhout), he shared a missionary trip to Scandinavia with his friend Ansgar, whom he later succeeded as archbishop in Hamburg-Bremen in 865. He also wrote a biography about Ansgar; Vita Ansgari.
Rimbert was unable to successfully complete the mission work to Denmark and Sweden, begun under Ansgar. He obtained market, coinage and toll rights for the city of Bremen in 888 from Emperor Arnulf of Carinthia and thus considerable improved the financial state of the archbishopric. In 884 he personally led a Frisian army against the Vikings and, after the victorious Battle of Norditi was able to drive them permanently out of East Frisia.
Rimbert is revered as a saint particularly in Frisia. His feast day is 4 February. After Ansgar, epithetised the Apostle of the North, Rimbert is revered as the Second Apostle of the North, besides the missionary Sigfrid of Sweden. Lutherans likewise honor Johannes Bugenhagen.