Remember that this is largely opinion and it is not based on the best jungle PICKS since that is highly objective and subject to opinion. This list is taking into account the potential of characters to jungle on their own regards to make measuring their capabilities easier.
God Tier – Lee Sin, Udyr, Skarner, Dr. Mundo, Nocturne, Trundle
Tier 1 – Jarvan IV, Maokai, Nautilus, Alistar, Riven, Shaco, Shyvana, Cho'Gath, Malphite, Amumu, Olaf
Tier 2 – Hecarim, Gangplank, Volibear, Rammus, Master Yi, Warwick, Shen, Sejuani, Jax, Xin Zhao, Wukong, Nunu, Tryndamere, Renekton, Fiddlesticks
Tier 3 – Gragas, Rumble, Twitch, Fiora, Singed, Kayle, Pantheon, Twisted Fate, Janna, Kennen, Blitzcrank, Taric, Sion, Ezreal, Soraka, Karthus, Cassiopeia, Lulu, Ziggs, Fizz, Leona, Caitlyn, Corki, Heimerdinger, Brand, Eve
Tier 4 – Veigar, Yorick, Poppy, Karma, Nasus, Irelia, Malzahar, Sivir, Galio, Akali
Tier 5 – Viktor, Mordekaiser, Graves, Varus, Orianna, Garen, Ahri, Talon, Annie, Urgot, Kog'Maw, Ashe, Sona
For tiers G to 2 - the placement is more important towards indicating "who is better" but less so for tier 3. In tier 3, just think of it in brackets as the champions here are more flawed and harder to argue. You can say that the higher tier 3 champions are better than the lower tier 3 though. For Tier 4 and 5 it's pretty much wishy washy.
Some people seem to be getting confused with the ranking. It should be obvious by seeing who gets the S scores that S means higher than A.
S scoring is just some video game thing used to say things like “Oh man you are amazing” etc etc. It’s most commonly used in arcade type games.
The things that changed this time around
Dr. Mundo – Yeah he went up higher. He’s frankly overpowered at the moment. Yes his ganking is not the best (pretty average) but it’s the overall package and efficiency. He has too much buff control (his cleaver is really strong) and he has one of the most broken transitions for any jungler in the game which may make him rise even more. Few junglers can build completely 100% durability and still smash your face in. Dr. Mundo can build nothing but durability (and cheap durability too) and still dish out insane amount of damage. This is why he’s one of the godliest junglers atm. He’s very cost effective, fast, flexible and he’s a tank.
Nautilus – Think of him as a slower and harder to use Maokai. They may switch places soon but I’m going to be fair with Maokai since I haven’t really used Maokai much as of late so I can’t just jump the gun here. Maokai is effective faster than Nautilus is and can be more efficient but Nautilus becomes a demon as the game goes on. I may have said before that Maokai was better than Nautilus but I’ve been practicing Nautilus more and he’s just a monster. As for why I rank him higher than characters like Shyvana? Well Nautilus can actually gank (incredibly well) and transitions easier. Some characters might have speed over him but he transitions so damn easily that he doesn’t’ care. He becomes really threatening very quickly into the game and becomes far more useful and even more powerful than some junglers that would beat him at the start. His starting jungle is pretty average but he quickly transitions into one of the strongest in the game.
Shen – He was bumped up to reflect his similarities with Warwick. Other junglers like Jax can gank better and dish out more damage sure but Shen’s ultimate gives him a lot of power and makes him stand out more as a jungler.
Hecarim – This one is curious indeed. He is average but slightly better than average after more testing. He’s basically Malphite with sustain over burst and no debuffs. His ganking is akin to that of Rammus and is very strong especially once level 6 is obtained. I can just think of him as another Malphite. They’re both flexible with builds and paths and are pretty okay with mana usage. They both don’t lose much health when jungling. Hecarim has the better ganking pre 6 (at 6 it’s pretty much the same) but Malphite has the better transition and damage.
Volibear – I figured out he was underrated and I was wrong on many levels about his potential. So where to start? I will not deny that he probably shouldn’t be picked because there are characters like Nautilus who end up destroying everyone better than he could but that doesn’t mean Volibear isn’t a strong jungler. Holy hell is his ganking brutal. It will force their escapes and probably still lead to them getting a huge beating and probably dead. His Q is amazing especially when you build cooldown reduction on him AND max it out second (lowering the cooldown). His mini Garen ult also provides an incredible amount of early damage to finish off gank targets during a chase. Better yet is his sustain and flexibility. While he may be slower than other junglers you can take whatever runes you want and make him faster or you can build him super tank to up his sustain and efficiency. He can jungle with any item, take any path and is ungodly when amplified with buffs. His passive is also incredibly effective. You won’t always notice it but it will keep you jungling indefinitely.
Varus – I don’t need to say anything.
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