Ballykissangel - where is it?

The British (BBC) television series of the same name was shot in Avoca (WW) which is 55kms south of Dublin.

Directions from Dublin
 

Take N11 South to Rathnew, then R752 via Rathdrum to Avoca.

An alternative (more scenic but a little slower) route from Dublin is to take N11 to Kilmacanoge, then R755 via Roundwood and Laragh (deviating perhaps via Glendalough to see the Monastic City and lakes en route at this point) then back to R755 via Rathdrum to Avoca.

The nearest town is Arklow