Ireland visa requirements
The rule for your own passport, from Ireland's official immigration page, with the date it was last checked. The same answer for every guide in Ireland: Cliffs of Moher & the Burren, Dublin, Galway, Killarney & the Ring of Kerry, Cork & Kinsale.
No visa needed
Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Iceland, Liechtenstein, Norway, Switzerland
Freedom of movement, and no time limit. Ireland is not in Schengen, so there is a passport check on arrival even from an EU country.
No visa neededup to 90 days
United States, Canada, Australia, New Zealand, Japan, South Korea, Singapore, Hong Kong, Taiwan, Brazil, Argentina, Chile, Mexico, South Africa, Israel, United Arab Emirates
Ireland is outside Schengen, so days here do not count against a Schengen 90-in-180 allowance — which makes it a useful place to spend a fortnight mid-trip.
No visa needed
United Kingdom
The Common Travel Area predates both countries’ EU membership and survived Brexit: British citizens can live and work here without any permission at all.
Visa required in advance
Every other passport
Entry rules change often and depend on your passport, your route and the purpose of the trip. Confirm on the official page before booking.