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No matter who I play, LeBlanc can rip me to shreds. Her full combo can take away at least half of my health, can be done in less then 1 second, and instant silences me. I already allot distance for her to avoid the combo, but even then, with the use of flash, she can wreck me. I'll stand at a tower and she'll wreck me. The alternative is to not farm at all, and hang at base. If she wasn't fed from kills, she'll be fed for cs, and I'll still be underfarmed and underleveled.

help D=

I guess a sustain mage should be able to harass her to give you the advantage.
I'm thinking... Morgana, Vladimir, Ryze possibly. Then again, I consider LeBlanc one of the most powerful mids due to being a mage who can forcefully break your zone of comfort to land her spells on you and disappear before you can react.
Sometimes feels like I do well with Annie also against LeBlanc, mainly because you can stun her if she dashes towards you and you get off more spells than her.

Generally LeBlanc is one of those annoying champs though... if you try to farm behind your turret, she's going to get bored and just go gank an easier target, so make sure to let your teammates know when she's not in lane, because she will get fed and that in itself will give you a harder time. You'll generally want to punish her harder than she harasses you for stepping close, if she's at half hp while you're at full and she still insists on harassing, you punish her and try to heal up your wounds with sustainability. Since I think spellvamp is rarely built on LeBlanc, so your damage on her actually matters more if you can heal up yourself after.

Oh ya! Katarina might be able to pwn her, get your bouncing blades to bounce onto her since it's a really good harass against non-sustain champs.
Farm with it at first, make sure to get your spellvamp item on first return. When you're sure she will get hit, make sure to activate your W for max damage output.

I'd say she'd be a good counter, chipping off her hp slowly from a safe distance through the minions will give you the advantage in an all out battle, and then if she gets confident, you might be able to finish her off.

Should be the best counter I can think off. If someone with cc comes to gank, you'll definately kill her off.

good point, wasn't thinking draft mode =p, I usually just play blind pick

Kassadin's Q is a good counter to her, but as you said, he's a very common ban nowadays. Brand requires a 2 spell combo to get his stun off. Issue with that is, any good LeBlanc won't give you 2 spells. You'll be barely able to get 1 in, and that's what needs to be the disrupter

Swain is a damn good mid and can pretty much take out most squishy mids

Ryze can counter her also

Morg but she gets banned all the time

and not sure but Karthus might seeing as hes the best mid champ ever

Its hard to lose against anything mid with kassadin or brand but le blanc can be a pain but is very squishy so if you know how to shut her combos down then defeating her is like a walk in the park. but since i usually do go le blanc i know your suffering when she drops half your health in half a second then gone and her chains are demons when it comes to team fights and carries when she chains the carry down then bombs the squishes. And forget about being able to catch her if you don't have your whole team surrounding her