Lelouch....he can think of 7 things at once...and when he met Mao, he immediately thought of 14 possibilities including the right one to who Mao is.....2nd would probably Light...

hope 2nd season for Code Geass comes out!

L, and another person not included in the votes, kyouya from ouran high =p

i'm on L's side but then lelouch is awesome and light in on par with L while conan figures things out with the littlest bit of evidence so hard to choose

Lelouch di Britannia

uummm...sos hard! but i have to say light,l and lelouch~!^^

i think L & Lelouch..coz both r smart... although Light also... dunno who 2 choose..can choose all 3 'L' haha... all names starting with 'L'

i think you should add kurama of yu yu hakusho.....

i think L

is this a versus thread???

I think this might be a duplicate......

Who is your favorite anime detective
http://www.crunchyroll.com/forumtopic-102234/Who-is-your-favorite-anime-detective.html

Smartest Detective
http://www.crunchyroll.com/forumtopic-2541/Smartest-Detective.html

both are somewhat similar to this topic.....
and what about detective academy Q??? they have some smart people as well

Lelouch for this one. He is indeed a smart, sound tactician and with his Geass ability, he can pretty much own the rest.

light and lulu

lelouch is an mastermind who will win at evrything

Screw L and his candy. It's not funny, and it's not cool in the least. Lupin III is the man.

L just because all that he does....while in a chair...and he likes strawberries

Well if it is a contest of smarts, between Laito and L, in the end Laito won.
Hmm can't decide between Laito and Lelouch. But a contest between them would be one I'd like to watch.

Never seen the other anime mentioned, so can't really comment.