Letterkenny University Hospital and Sligo University Hospital rank among the top five hospitals nationwide in relation to overcrowding this morning.
The INMO has released the figures which reveal that 33 patients are on trolleys in Letterkenny, with 32 in Sligo.
There are 577 patients without a bed across Ireland today, with the most being 112 in University Hospital Limerick.
The INMO has previously expressed concern that hospitals could become overwhelmed over the course of the Easter Bank Holiday Weekend.