Over a quarter of a million visits were made to Office of Public Works sites in Kerry last year.
According to figures from the OPW, 257,772 people visited sevens sites in the county during 2016, up 6,447 on the previous year.
Most saw an increase in tourists, however Ross Castle in Killarney saw a big drop in visitor numbers.
The biggest increase last year was at the Blasket Centre in Dun Chaoin, which had 53,004 visitors, up 4,743 on 2015.
An extra 3,489 visited Gallarus Castle in Ballydavid, which saw a total of 55,300 (55, 305) visitors.
There were increased visitor numbers on Skellig Michael, up 2,008 to 14,648.
Derrynane House, Caherdaniel, the ancestral home of Daniel O’Connell had 1,617 more tourists last year at 28,578.
Some 8,791 people went to Ardfert Cathedral last year, 989 more than the previous year.
There were 8,100 visitors to Listowel Castle last year, down three; while there was a drop of 6,446 people visiting Ross Castle in Killarney last year.