How old or young do you go when looking for a relationship?

It really depends on how much they've matured and where they are in life. I think many people change even more from 18-25 than in their earlier teenage years. I prefer within 3 years of my age, but I'd go as far as 5, maybe even a little more if I really clicked with someone. It just has to feel right. So, 25-30 is the best range for me, but possibly up to 21ish-33ish, just depending on the person.

At my ripe age of 16, I do set up a limit for myself. 2 above, 2 below. That's my age limits for the moment and I'll most likely stick to it unless some lucky girl that's like 13 and younger SOMEHOW hooks me into dating her.

As someone who's 25 (soon to be 26), I generally try and stick around 22-30. Granted, there maybe some exceptions, but for the most part, I like someone who's a little closer to my age. There's a higher chance of finding something to relate to when staying within a closer age group. That's not always the case, but speaking from a general standpoint, the probability is higher to find someone with more in common closer to your age group.

Well there is a old rule that it is half your age +7, but for me I would date someone any where from about 18 to 30. Since I'm about the middle at 24.

My ex was eight years younger than me. That kinda made it hard, being in different places in our lives. Since then I'd probably date, like serious date, 5 or 6 years around my age.

OtakuJT's rule of 2 up and 2 below is pretty accurate. I can relate to someone easier if they're closer to my age group.