Do Australia passport holders need a visa to visit IE?

No visa needed. Australian passport holders can enter Ireland visa-free for tourism for up to 90 days; the exact stay is set by the immigration officer's stamp on arrival. Australia is on Ireland's visa-exempt list, so ordinary Australian passport holders do not need a visa for short tourist visits. On arrival, an immigration officer grants permission to stay, typically up to 90 days, by stamping the passport. Ireland is in the EU but NOT in the Schengen Area, so time spent in Ireland does not count toward the Schengen 90/180 limit, and the EU's ETIAS travel authorisation does not apply to Ireland. Travellers should carry a passport valid for the duration of stay, proof of onward/return travel, accommodation details, and evidence of sufficient funds. Visa-free entry covers tourism and short visits only — paid work is not permitted.