Rossmore Forest Park is a national forest park located in County Monaghan in Ireland run by the Irish States forestry organisation, Coillte.

It is situated approximately 5km outside Monaghan town[1] and has its main entrance on the R189 Threemilehouse/Newbliss Road.

[2] The park was the site of Rossmore Castle, which was demolished in the 1970s.

The park hosts migratory birds, both over winter and the summer.

[2] The park is primarily used for recreational purposes and has several walking trails across 320 hectares.