I've got some pretty good Irish heritage going on in my house. In fact, I'm the least Irish member. The dog is actually an Irish immigrant, the husband's completely Irish. The little lord has more than me, and (in the words of my mother) I'm a mutt...albeit a mutt with a good helping of Irish.
Anyway, living in Boston I tend to forget that Irish heritage is not ubiquitous in the US. I found this map that shows that my skewed vision is at least somewhat justified:
So not only do I live in a region that's heavily Irish, but I apparently have spent the past 10 years in zip codes that were 30% Irish or more.
Always interesting to explore your own potential perception skews.