Monaghan County Museum (Irish: Músaem Chontae Mhuineacháin) is a museum which documents the history of County Monaghan.

After rescuing the collections, the museum was moved for a period to St Macartan's College.

The museum has won a number of awards over the years, including Council of Europe Museum Prize in 1980, and the Gulbenkian - Norwich Union Award for Best Collections Care in 1993.

The museum also maintains a large collection of archival material, which include early estate records (rentals, maps and wages books) and local authority records.

[2] There are a number of notable archaeological objects in the museum, an example being the Lisdrumturk Cauldron, which was discovered in a bog in the county.