There's a reason why the first Injustice game was had the subtitle "Gods Among Us". It's because DC has some insanely powerful characters, some of them being quite literally gods.
Characters like Superman and Wonder Woman have proved again and again that they're the upper echelon of strength, given the fact can go toe to toe with powerhouses like Darkseid and Mongul.
But for every god, alien and demigod, there's a human being that's just as, if not more powerful than them. Sure, two members of the Trinity may not be human, but there's a reason Batman stands shoulder to shoulder with them, and it's not just because of his wallet.
Whether it's because of magic, atomic experiments, or because of awesome piece of jewellery, there are a lot of humans within the pages of DC Comics that can boast about being stronger than Superman.
A small but important disclaimer before we get into things, characters like Zatanna and Raven don't qualify, since Zatanna is a Homo Magi (literally a different species), and Raven is a half demon.
Now with that out of the way let's take a look at the some of the most powerful humans in DC Comics.