Isenburg-Meerholz was the name of a state of the Holy Roman Empire, based around Meerholz in modern Hesse, Germany.It was created as a partition of Isenburg-Büdingen in 1673. The counts of Isenburg-Meerholz were amongst the allodial heirs of Limpurg. It was mediatised to the Principality of Isenburg in 1806.