The OPW have released the figures
15.3 million people visited the country's historic castles, gardens and monuments last year.
The Office of Public Works says the numbers are up around 300-thousand when compared to 2022.
It's responsible for caring, maintaining and operating 780 important heritage sites nationwide.
The most popular ticketed sites last year were Kilkenny Castle and Parklands, Dublin Castle, and the Rock of Cashel in Tipperary.
In Kildare, almost 700,000 people visited Castletown House and Parklands, while 23,500 people visited Maynooth Castle.