St. Davnet's Hospital (Irish: Ospidéal Naomh Damhnait) is a psychiatric hospital in Monaghan, County Monaghan, Ireland.

The hospital, which was designed by John McCurdy, was opened as the Cavan and Monaghan District Lunatic Asylum in 1869.

[3] The Irish republican, Peadar O'Donnell, was regarded as the first Irish person to use the term "occupation" in relation to the occupation of a workplace, when he and the staff of the hospital occupied the site in 1919.

"The occupation was, in fact, the first action in Ireland to describe itself as a soviet, and the Red Flag was raised above the hospital.

[5] After the introduction of deinstitutionalisation in the late 1980s the hospital went into a period of decline[6][7] and activities became focused on Blackwater House.