Over 2,000 people were recorded as being on trolleys or chairs in local hospitals last month at local hospital Emergency Departments.
The numbers of people waiting at the Sligo University hospital ED last month was 167% higher than the figure for 2021.
Over 8,680 patients have been without a bed in Irish hospitals in May according to the Irish Nurses and Midwives Monthly TrolleyWatch figures.
Sligo University Hospital and Galway University Hospital had the third highest totals in May of 761 patients each waiting at the ED for treatment last month.
The total in the north west hospital is 167% higher than what it was for the same month last year when a total of 285 people were at the ED.
The figure for this year is still twice what it was in May of 2019, pre-pandemic, when 341 people were at the ED in May of that year.
Galway University Hospital also recorded a significant rise in ED numbers in the last 12 months - rising from 220 in May of last year to 761 this year.
Figures for other hospitals' EDs in this region in May were broadly similar to 2021 numbers- except at Tullamore hospital where there was a marked decline in the numbers year on year at its ED - dropping from 164 to 95 in the last twelve months.