That's an increase of nearly 50 on last year's figures.
The INMO is imploring the HSE to ''look after its staff'' as record overcrowding in Irish hospitals is expected in the new year.
The organisation says the Health Service executive has left it too late as the situation was predicted back in July of this year.
Over 5,500 patients have been on trolleys in midlands hospitals this year - 3,016 in Mullingar, 1,447 in Tullamore and 1,054 in Portlaoise.
That's an increase of nearly 50 on last years figures, when the total number of patients waiting on beds in the region was 5,470.
According to INMO members care in hospitals is now unsafe due to pressure on the healthcare system.
General Secretary of the INMO, Phil Ni Sheadhaga, says nurses and midwives are under serious pressure:
EU Set To Unveil Housing Package As Fiscal Rules Face Relaxation
Midlands Driving Instructor Calls For Mandatory Alcolock System
Westmeath Family Into Final Of Ireland's Fittest Family
Motion Calls For HSE Investigation Into Wind Turbine Noise Passed In Offaly
Irish Farmers Head To Brussels On Tractors To Protest EU Policies
Man Arrested Over Alleged Assault At Midlands Prison
Emergency Services Attend Westmeath Car Fire
Unanimous Vote Supports €20m Midlands Hospice Project
Drink Driving Rider Arrested After Illegal E-Scooter Seized In Offaly
Drug-Driving Surge Sparks Calls For Christmas Crackdown
Revenue Seize Over €243k In Contraband In The Midlands
Tributes Paid To Laois Man Following Accident
Midlands Hospice Planning Application Passed By Offaly County Council
Tolü Makay Joins Cast of DWTS Ireland
HSE Warn Flu Season Is Most Severe In Years
Laois Motorist Caught Speeding At 149 km/h
Offaly Woman Opposing Removal Of Roadside Memorial Removals
White Christmas Possible For Midlands
Midlands Campaign Urges Church To Explain McGregor Wedding Decision
Gardaí Search Suspected Westmeath Brothel