The Irish Nurses and Midwives Organisation Trolley/Ward Watch figures for the month of October show that there were 8,903 patients admitted for care, for whom there was no in-patient bed.
The latest INMO data confirms that the level of overcrowding in hospital Emergency Departments and wards continues to reach record levels.
October saw a 15% increase when compared to October 2016, and in the first 10 months of this year (January to October) there were 82,459 patients on hospital trolleys and overflow wards.
This represents an 8% increase on the first 10 months of 2016, and a 96% increase in the first 10 months of 2007, according to the INMO.
The INMO figures also show very marked increases in other hospitals including Wexford General Hospital, which saw their numbers rise from 55 in October 2016 to 241 in October 2017.
In Donegal, Letterkenny University Hospital had a rise from 121 in October 2016 to 459 in October 2017 of patients waiting for hospital beds.
The INMO will meet with the Health and Safety Authority (HSA) on November 30.
They said: "It is not acceptable that staff should have to work, in such overcrowded environments, on a daily basis."
He said: "These figures, yet again, confirm the obvious reality that our public health service is critically short of acute hospital beds, which is having a serious, detrimental and harmful effect upon patient care.
"In order to address this crisis there cannot be any restriction, on the funds available to increase the capacity of the health service, as we enter the winter period.
"The Emergency Department Taskforce is scheduled to meet on 4th December 2017. The INMO will be seeking confirmation, at this meeting, that all of the foregoing measures, together with any other initiatives necessary to address this crisis, have been introduced across the system."