Can a Felon travel to Ireland?

Why not? They let Trump in.

Requirements to enter Ireland

These US citizens who remain in the country for less than 90 days only need a passport. Visa is not required. ... Criminals do better when they plan to limit their stay in the country to less than 90 days so they don't have to check their criminal records.

Depends on what they have been convicted of and if that conviction requires them to get a visa before they travel, if the visa is rejected then you have your answer, if the visa is accepted it would then be up to the immigration officer at the airport if they allow you to enter or not......so by getting a visa it doesn't automatically mean you will be allowed to enter Ireland

It’s not an automatic refusal, but it will exclude you from the Visa Waiver arrangement between the USA and Ireland.

Whether you’re then granted a entry visa (which you’ll have to apply for and be granted BEFORE you travel) will depend upon how serious the crime was, how long ago you completed your sentence, and whether you have committed further offences since then which you were either convicted for, cautioned for, or for which prosecution is still pending.

Immigration authorities worldwide frequently share information with each other, but also national governments routinely harvest public information worldwide about convictions, which are usually a matter of public record. So if you chance it and don’t declare your record, or apply for a visa and then lie about the seriousness of your record, you will be highly likely to be refused entry upon arrival and as lying is seen as a serious matter, banned from entering Ireland for many years.

you need to ask immigration this question

Yes.........................................................................................................

Yeah, I live in England but I know this "felon" (aka you) can go to Ireland, but you need to be honest on your passport. Where it says about the criminal record tick it. And when you travel to Ireland you will be given an online survey or a sheet of paper where you have to tick things but you must be 100% honest. I know British border control will flip if they find out you've lied. They'll send you on the next flight back and may (unlikely) but may not allow you back into the country.