Werner I, Bishop of Strasbourg (born between 978 and 980, died October 28, 1028) was bishop of Strasbourg from 1001 until his death in 1028. Werner was one of the last bishops to be appointed by Otto III, Holy Roman Emperor.
In 1015, Werner laid the first stone of a cathedral on the present site of Notre-Dame de Strasbourg in Strasborg, Alsace.
Werner's father was Lanzelin of Altenburg (and of Klettgau), who died in 991 and his mother was Lutgart, Countess of Nellenbourg.
According to Eduard Hlawitschka, Werner and his brothers Rudolph I and Radbot of Klettgau were the first members of the Habsburg family. They were sons of Lanzelin, Count of Altenbourg (son of Guntram, Count in Breisgau), and of Lutgart, Countess of Nellenbourg (daughter of Eberhard, Count of Thurgau).
He died of fever, on the banks of the Bosphorus on his way to Constantinople.