There were almost 5000 people waiting for a bed at Letterkenny University Hospital last year.
Nationally, there was a six percent increase in the number of hospital patients waiting on trolleys in 2017.
The Irish Nurses and Midwives Organisation says overcrowding is unlikely to decrease unless drastic action is taken.
Letterkenny University Hospital recorded a total of 4889 people waiting for a bed in 2017 compared with 2047 in 2016.
Just under 99 thousand were recorded as waiting on a hospital bed last year across the country - of that, University Hospital Limerick recorded the highest annual number.
Nationally, there was a 6% increase in the number of people waiting for a bed.
Speaking on the Nine til Noon show earlier the INMO's General Secretary Phil Ni Sheaghdha told Greg Hughes that more acute beds and more nurses are needed as a matter of urgency: