I have to agree with Joy Bennett's definition. It's how you feel and how you relate to other people of various ages. I'm in my 40's, but count among my friends and musical cohorts those in their 20's on up, and a few younger than that.

About not enough folkies of your age out there, fear not! In the Celtic music here in the states, there is a whole slew of younger musicians who are making their mark. In the Boston area alone, Laura Risk, Laura Cortese, and Hanneke Cassel are some incredibly talented fiddlers, and in San Francisco, 14 year old Brittany Haas is a Bruce Molsky clone at old-timey fiddling, with her 17 year old sister Natalie a folk cellist who has recorded with Alasdair Fraser.(don't know if Molsky and Fraser are familiar names to you) That's just a small sampling of this new generation who are taking traditional music to new places, yet are mindful of tradition. You're in good company. Maybe you'll meet up with folkies your own age in any travels you might take - and don't forget about jamming with us 40-somethings! :-)

-chanteyranger