I love Irish bands! Pretty much any band that comes from Ireland is good.
I'm an American, and, as such, I don't know many. I know a few (Ash, Sixstarhotel, And So I Watch You From Afar).
So, I guess this can be a place to talk/spread the word about Irish/Celtic bands!
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Fender Jaguar HH Special ->
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Quote by BlitzkriegAir
theres this band Thin Lizzy
i believe theyre Irish
not sure how popular they are

I don't know if this is a joke or not...

Some other great Irish bands are...
The Pogues
The Dubliners
The Frames
The Clancy Brothers

If you like great fake irish bands check out
Flogging Molly
Dropkick Murphys
The Cast of Cheers
Adebisi Shank

That's all that springs to mind.

try the script and u2 of course. thin lizzy are a great irish band. there snother band called the rip tide movement check them out on youtube. and the coronas and the blizzards are good
alan kinsella
I don't know many irish bands but i know some northern england/scottish bands that have the same feel.

Martin & James are a scottish duo, they are good depending on what type of music you like. They are more acoustic.

Milburn is a band that split up, but i find that the singer's accent makes the songs really interesting. They're songs are more upbeat.

Check them out