Do you mean Iceland (IS) or Ireland (IRL)?!

Iceland - you can get there from Hirtshals, in Denmark.

Ireland - there are ferries from Wales, Scotland, France and possibly Spain.

Hi i mean island (IS) 

so Only from Denmark …. No way from England ?

thanks!!!

Sadly there’s nothing from UK any more.

From Denmark, it’s a once a week service with Smyril Line. It leaves from Hirtshals on Saturday afternoon, calls at Tórshavn in the Faeroe Islands, and arrives in Seyðisfjörður in Iceland on Tuesday morning.

https://www.smyril-line.com/sailing-schedule

There are some reports of the journey on Seat61. It sounds like a good quality ferry, and you can explore Tórshavn during the stopover there on Mondays.

https://www.seat61.com/Iceland.htm