That's according to the Irish Prison Service's annual report.
The daily average number of prisoners in custody increased by nearly 9% last year.
The Irish Prison Service's Annual Report for 2022 shows there were over 4,100 prisoners in custody every day, compared to nearly 3,800 in 2021.
The Midlands Prison saw an average of 861 inmates every day last year, compared to an overall bed capacity of 875.
While Portlaoise Prison's 231 beds were also almost full every day, with 217 prisoners in custody daily.
The Midlands Prison accommodates the second-highest number of prisoners serving life sentences, at 15.
That figure is nine in Portlaoise Prison, and is being tracked since the introduction of a new model of engagement for people serving life sentences back in 2017.
Gardaí Confirm Discovery Of Man's Body At Midlands Premises
Laois Senator Warns Blister Pack Funding Cut Will Lead To Dangerous Confusion
Call To Fast-Track Living City Initiative For Westmeath Town
Midlands Community Sports Facility Closing With Immediate Effect
Man Arrested In Connection With Fatal Offaly Fire Released Without Charge
Westmeath Waste Facility Remains Temporarily Closed
Laois Man To Be Laid To Rest Friday
Laois Community Safety Partnership To Start January
Midlands Community Groups To Get Communication Grants
Offaly Community Shop Highlights Services
Offaly TD Urges Action On Student Accomodation
Laois County Council Urge Continued STEM EU Just Transition Funding
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