The HSE made almost €12m from hospital parking charges last year.
The €11.7m figure is slightly down compared to 2017, when €12.8m was earned at 33 of the country's public hospitals.
According to the, parking fees at Dublin hospitals were the highest, with the Mater charging €15 per day.
Cork University Hospital made the most, collecting €2.6m from visitors, followed by Galway University Hospital on €1.4m and University Hospital Waterford on €1.2m.
In 2018, Health Minister Simon Harris ordered a review of car parking fees at Irish hospitals.