Naruto is home to some of the strongest characters to ever appear in an anime - seriously, there are characters who can wipe out the planet with a single move, which isn't something that can be said for every show. But with so many outlandishly strong contenders, who are the most powerful Naruto characters?
Members of the Uchiha clan, a family known for their incredible eye based ability, crop up frequently. Sasuke Uchiha begins life as a child prodigy who can hold his own against adults, but he ends up gathering such a wide range of powers that he's almost godlike. Madara Uchiha follows a similar trajectory. But super-powered characters crop up outside of the Uchiha clan as well - Tsunade can not only heal herself and others with speed and precision, she can also split the ground open with her fists. And let's not forget Kaguya Ōtsutsuki, the first person to ever wield chakra, who can use just about any power to ever exist.
Who is truly the strongest? You be the judge.
Kaguya Ōtsutsuki doesn't just wield the power of the Ten Tails, she is the Ten Tails. She's also the first person to ever use the power of chakra. She can absorb any chakra-based techniques she comes across, and just releasing a little bit of chakra can result in a massive shockwave. Madara is noted to be one of the strongest ninja in Naruto history, but Kaguya is more powerful than he is. She can harden her hair to such strength that it pierces Susanoo, a so-called ultimate defense, and she can manipulate her bones into offensive tools. She can travel to other dimensions and wield truth-seeking balls that are powerful enough to wipe out the universe.
These aren't even half of her abilities - if a power exists in the world, Kaguya probably has it. After all, she's the originator of all chakra.
At the age of 13, Itachi was the strongest member of the Uchiha clan: one of the most powerful clans in Konoha. He was a member of ANBU, an elite faction of Konoha ninja that accepted only the most talented, and could easily take on any adult.
This is why Danzō chose him to manipulate into slaying his entire family. He successfully wiped out the whole Uchiha clan with Obito's help and became a valuable member of the Akatsuki after that. He mastered just about every standard ninja technique while making great use of what his mangekyou Sharingan had to offer. Specifically, he could use Ameterasu, a move that creates a fire that never stops burning, and Susanoo, a powerful chakra-based armor. He's also a master of genjutsu, which allows him to create powerful illusions that trap and control his opponents.
Despite suffering from an unnamed terminal illness, he's still one of the most formidable ninja in the world.
It takes a metric ton of strength to be able to be willing to have your eyeball plucked out as you're on the verge of losing your life, and then to recover from having half of your body smashed under a boulder. If Obito had stopped there, he still would have deserved a spot on this list, but Obito became even stronger than that - he's able to use just about every ability that the mangekyou Sharingan and the Rinnegan have to offer, including resurrecting ninja from the past, powerful genjutsu techniques, and more.
His more noteworthy ability is Kamui, which allows him to travel to different dimensions and to permeate objects at will. He also houses the Ten-Tails, the most powerful tailed beast of all, in his body, which gives him access to a plethora of potentially world-ending techniques.
Kakashi Hatake is so powerful that he was conscripted into being a ninja at the tender age of 6. Though he began with limited chakra reserves, he's dramatically increased his skill in this department. He can use every form of elemental release, though he specializes in lightning. Despite not being born with a Sharingan, he's able to wield its immense powers effectively, while also being smart enough to avoid its pitfalls most of the time.
He can summon a pack of dogs to do his bidding, and god help anyone who tries to best him in a physical fight.