Edit: Here's some manga that don't exactly fit your request, but I think you'd like them:

Paradox Blue [more school-life and less detective like, but it does involve solving mysteries and stuff]
Doll Star [more supernatural than Sherlock-ish]
Time Eliminator [does involve use of technology, but the protagonist uses his brain more XD]

Mythical Detective Loki
Cuticle Tantei Inaba [not really Sherlock-ish I guess but amusing i guess... lol]
Shinrei Tantei Yakumo - Akai Hitomi wa Shitteiru

Psychometrer Eiji
Kindaichi Shounen no Jikenbo

Zennou no Noa - The World of Lostmemories

its not really detective, but a brilliant guy and i can second a lot of the named choices since i adore detective manga's

but this will be worth your while... its not out so long yet so a definite turn on

(it can beat code geass in my eyes... and if you know code geass imagine how high my opinion is of this manga)

I second psychometrer eiji

remote I don't know whether it's too ecchi for you....all I remember are panty-shots and.....mature content.besides that it should fit perfectly.no supernatural but only an ingenious detective

[img]http://www.nodiatis.com/pub/19.jpg[/img]
[img]http://www.dragonflycave.com/wpay/alakazam.gif[/img]

Quote from energizerbunny

Detective Conan? It was the first thing that came to mind - there are most likely many others.

I second that ^.^ that's the only detective manga i know of... although it becomes pretty repetitive at the end... 😛

D'oh!

Right now i'm reading deka wanko, its about police investigation.Less mystery but its funny and at least I can read for the first time a policewomen set as main character.
I will try other series until I finished deka wanko.Thank you for all the wonderful suggestion...can't wait to read the rest. 😀

I think Death Note is worth a mention here. Sure, the protagonist isn't the detective, in fact he's the bad guy, but if you're looking for a manga with smart storytelling and a detective genius with deductive skills, you have to read it.
It's pretty dark, but it is by far the most intelligent manga I have ever read. Don't miss it.

"The light shines in the darkness, and the darkness has not overcome it."

Shorts:
Goth
K no Souretsu
Stone Cold

Long:
Majin Tantei Nougami Neuro Even though it has 'demon' stuff in it, the main female become very deductive near the end and

even become a legitimate detective when the demon leaves

Quote from Shuriken

Spiral: Suiri no Kizuna

I second this, as it not only fits your criteria perfectly, but also happens to be my #1 favorite manga of all time.

i'll third Psychometrer Eiji
(?) 😕
don't know if it's fit ur category

and yes, death note is great!!! i second this

[img]https://i.imgur.com/lHjrfaR.jpg[/img]

I've read it a long time ago but maybe 0 no Soukoushi might fit.

[color=black]Does not compute.[/color]

A lot have already been mentioned so I will throw a few in that deviate slightly but you might like anyway.

I third Death Note and Spiral: Suiri no kizuna

Also try Matantei Loki - supernatural mysteries but all solved using logic.

Kuroshitsuji - not really a detective but there are mysteries and logic involved.

Banana Fish - this involves a teenage genius who amazes those around him but isn't a detective story.

If you like anime I recommend Code: Geass. There are no detectives but if genuises and logic games are your thing this is a must!

The pen is mightier than the sword...and considerably easier to write with.

Quote from QuasarX

Quote from Shuriken

Spiral: Suiri no Kizuna

I second this, as it not only fits your criteria perfectly, but also happens to be my #1 favorite manga of all time.

Its my favorite also..... 😀 😀

Pluto - although he does get a very big boost via technology.

Yukan Club - too bad SCX dropped it...
Yumekui Kenbun - which literary means Nightmare Inspector...

its cold down here fam ~