Just wonderin

Nobody ages in TES games, apparently.

Don't think so. Babette in the DB looks like a 10 year old but is a vampire. She then mentions a contract she did nearly 200 years ago.

lol I think he means lore wise and I don't think they do but what you have to remember is that there are numerous kinds of vampires, the skyrim vampires sufffer from a different but very similar disease to the cyrodillic ones and I remember one cyrodillic vampire (whos dust I think you need to cure yourself and Count Hassildor's wife.) who was supposedly an ancient vampire of great power and had supposedly lived for hundreds of years. It's fair to assume they don't age or perhaps they just age slowly as you have the class of Ancient vampire

From what I know vampires who were born as one age normally whilst people who get it later in life live forever. Only assuming as if you were born a vampire you wouldn't age at all. But if you mean by a non-lore based answer then no, no one ages in the game.

They age, but very VERY slowly.

They don't age at all, I don't know where people are getting "very slowly".

Vamps don't age. They're already dead so aging would make no sense.

Remember that little girl in the Dark Brotherhood?

They age as regular being of there race mentally does except that there body stops at the point vampirsm has fully develop in there body.

I think people are just talking about physical aging.

They get "older", but not older.

This is from the UESP Wiki on Daggerfall Vampirism.

Vampires are ageless but they are not immortal. This distinction is important because the reader must understand that while any given vampire may be older than the oaks, he too may cross to Oblivion. Since vampires do not die of old-age, all dead vampires have succumbed to a violent end. Vampires, like Lycanthropes, can only be harmed by Silver (or better) weapons.
Barring a horrifically violent end, a vampire continues to learn and advance his trades throughout his (now unnaturally long) life. The benefits of agelessness combined with the capacity for growth of all thinking creatures should be self-evident. Any vampire "ancient" by our standards should be considered a Grand Master in any trade or profession to which he has applied himself. Indeed, if given hundreds of years of practice and study, one should expect any vampire to be extremely adept in any skill or ability and therefore great caution should be exercised when dealing with any vampire.

God damnit.. I dislike vampires, but this paragraph is making me consider playing one.

Now all they have to do is offer me some cookies and I'm in for some vampire action.

Seeing as you can live forever, you could eat cookies for as long as you like...

My weight in pizza and chocolate milk, here I come!