Im pretty sure he isnt but if it is, I would like to know
Personally, I think he is a gnome :s

He's a flying Yordle.

Yes, he's a yordle. He's from Bandle City, just like all of the others, but moved to Piltover with Heimerdinger and his colleagues.

Yordles is just a loose affilition of weird short men who are either into mustaches or furries. The woman are actually little people who cosplay as Elves from Warcraft.

He is indeed a yordle

word on the street is that back in the day there was 2 types of mini people, meglings and yordles, not to confuse people they made them just yordles and meglings became a elite commando unit. but now if we take a look at a few of the "yordle" champions, tristana and poppy dont have the same nose that the typical male yordles have, i dont think its necessarily a gender thing but more so that trist and poppy were meglings not yordles, yordles kinda have lil critter type nose and little critter ears and meglings dont have those features. thats what i read on this board a little while ago atleast

http://na.leagueoflegends.com/board/....php?t=2453597 proof corki is not a yordle

Corki is a test pilot for a yordle contraption. Is he or isn't he a yordle? It's never specified.