Conrad (died 27 February 906), called the Old or the Elder, was the Duke of Thuringia briefly in 892–93.
He united all of Hesse under his political control and under his heirs this territory became the Duchy of Franconia.
In 892, Duke Poppo was deposed from his offices and replaced in Thuringia and the Sorbian March by Conrad.
The reason for his appointment probably represent a change in Arnulf's policy in favour of the Conradines over the Babenbergs; but Conrad's short tenure may reflect his lack of support in Thuringia or an unwillingness on his part to be confined there.
In 906, as a result of a feud with the Babenbergs, Conrad was killed in battle near Fritzlar and was buried in the church of Saint Martin at Weilburg.