Adalhard II (c. 840 – 2 Jan (?) 890) was Count of Metz and Mozelgau. He was probably the son of Adalard the Seneschal.
Adalard is mentioned in documents from between the years 872 and 890 as Count in Metz and Mozelgau. Also in the years 878 to 890 he is referred to as the lay abbot of Echternach. On the basis of onomastics, and because before him this monastery was owned by Adalard the Seneschal, it is assumed that Adalard II is his son.
His wife's name is listed as Adalarda in sources not mentioned. On the basis of onomastic data the historian Edward Glavichka believes that his wife Adalarda was the daughter of Matfrida II, count of Ayfelgau. Their children were: