Wied-Neuwied was a German statelet in northeastern Rhineland-Palatinate, Germany, located northeast of the Rhine River flanking the northern side of the city of Neuwied. Wied-Neuwied emerged from the partitioning of Wied. Its status elevated from County to Principality in 1784. Pried-Neuwied was mediatised to Nassau and Prussia in 1806.

The House of Wied-Neuwied with William of Albania ruled Albania (Principality of Albania). Among the notable members of the family are Prince Alexander Philip Maximilian, the second son of Prince John Frederick Alexander and a famous explorer, ethnologist and naturalist. The latest successor of this family is a possible claimant of the vacant Albanian throne.