Dundalk Grammar School has crept into the top 100 schools in Ireland at 97th place according to a list compiled by The Sunday Times.
The town boarding school slipped down from 84th last year.
Limerick's Coláiste Laurel Hill, an all-girls secondary school, has been ranked number one on the list.
Dublin's all-boys Gonzaga College and Presentation College in Cork made up the top three.
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