How old do you have to be go school in ireland?

In Ireland the first level of education known as primary school starts at the age of four or five. Education at primary school level (known as elementary education in some countries) is compulsory and lasts for eight years.

The second level of education, commonly known as secondary education, covers schooling for students usually aged 12–18. It is divided into two cycles, a three-year junior cycle followed by a five-year senior cycle.