This is one of the main powers of all Kryptonians. Pre-Crisis it was due to having super-dense bodiesnote Red sunlight could still make them vulnerable, though, Post-Crisis it was powered by yellow solar energy. The exact limits of Kryptonians' strength are unknown, but they are capable of lifting far in excess of 100 tons. Different periods and intensities of exposure to Earth's solar radiation can cause their strength to fluctuate over time. Kryptonians' known feats include lifting an enormous pyramid and flying it to Mars without any strain and having the strength necessary to shatter small planets. Unhealthy levels of high exposure to specific radiation can exceed Kryptonians' "normal" strength level. The major examples:
In Krypton No More, Superman demonstrates his tremendous strength when he lifts a super-tanker, intending to throw it into orbit.
In the first issue of Kryptonite Nevermore, Superman rips off the roof of a plane to arrest several thugs.
Superman vs. the Amazing Spider-Man: Superman is strong enough to drive a Humongous Mecha into the ground. When he is about to hit Spidey during their mandatory fight, he manages to pull his punch, but the wind-blast strikes Peter "with the strength of a compact hurricane".
In War World Superman punches The Spectre with his full force. The blow's force shakes the surrounding terrain (but it does nothing to The Spectre).
Kara Zor-El/Linda Danvers is also a textbook case. Depending on the version her original limit was a mere 100 tons, sometimes she's just as strong or slightly stronger than her cousin Superman.
In the Red Daughter of Krypton storyline both cousins have a short fight. When Supergirl picks up an ocean liner easily and swats her cousin with it◊, just to clarify (if it wasnt obvious already) how massively strong Kryptonians are.
In Demon Spawn Linda argues with bully and rival 'Nasty'. Afterwards she punches a wall out of anger and frustration. She accidentally cracks the wall and moves a cabinet to cover up the hole. Meanwhile, her co-workers wonder whether a plane crashed into the building, her punch resounds so loud.
Supergirl: That proves I have super-strength too, just like my cousin Superman!
In the modern version of that same story, Kara wanders around the streets of Gotham City after leaving her rocket, and she bumps into three co-workers. One of them accosts her, and Kara crushes his hand. The second tries to threaten her with a hook, and Kara slams him into several boxes and bends the steel hook with her bare hands.
In Gotham City Garage, Kara Gordon discovers her inhuman strength when she lifts a huge truck with one hand.
Bizarro and Bizarrogirl are just so strong. During her eponymous storyline, Bizarrogirl punches Supergirl so hard than Kara flies through the ceiling of a sewer and crashes into a building's wall which explodes upon impact.
Captain Marvel has this in spades due to having the Strength of Hercules, which is often further augmented by the Power of Zeus. Cap was one of the earliest superstrong heroes alongside Superman during the Golden Age and it's generally agreed that it was the rivalry between Superman and Captain Marvel that caused them to become so powerful over time. When Superman started out, he could lift a car over his head and rip steel doors off their hinges. By his third appearance, Captain Marvel was lifting over 200 tons worth of weight in either hand. They kept outdoing each other in this way until both were capable of affecting planetary bodies through sheer brute strength. When working together both Supes and Marvel could lift a multiverse inside a book◊.
Solomon Grundy like Doomsday has strength which can fluctuate Depending on the Writer or incantation of the character. Sometimes like in his early comics Grundy is a badass who gives a pounding to the entire JLA and can even knock Superman around in old◊ comics◊ and modern◊ ones. This gets very annoying when comics depict distinctly non-superhuman Batman being able to soundly◊ defeat◊ Grundy, despite the fact Solomon Grundy can lift cars◊ (something Batman can't do), effortlessly overpower Killer Croc (one of the strongest of Batman's Rogues Gallery) and beat up the aforementioned Superman multiple times (which Batman needs Powered Armour and gadgets to do). DC's flimsy justification is every time Grundy dies and is reborn in the Slaughter Swamp he may get stronger, weaker or even gain intelligence depending the mood.
Aquaman. Thanks to his Atlantean Physiology his adaption to underwater living making him very strong on land and under the sea, Aquaman is strong enough to lift 16,0000 ton submarines◊ and severalcruise ships. Or if he really pushes himself, Aquaman can move a tectonic plate◊ (that's 44 quintillion metric tons BTW).
Originally downplayed with Deathstroke despite the Super Serum, Slade only gained the peak human strength which meant he had focus on being The Strategist when fighting the genuine superhuman members of the Teen Titans and JLA. However in New 52 and Rebirth Deathstroke's strength is more explicit thanks to his Nth Metal Armor he can rip off a plane's door◊, use a BFS and once swung around a slab of concrete◊ as a weapon when fighting Batman. Even when not armored Deathstroke at one point kicked dumpster so hard it indented and crushed a man into a wall.
Marvel Comics actually have a nifty◊ "Strength Scale" to reference from, so expect anything that's above Athlete and Peak Human Strength (4 to 7) i.e Class 10, Class 50, or even Class 100+ (Planet breakers) to be on this page.
The Incredible Hulk is the standard to which other Super Strength wielders are compared in the Marvel Universe, and he only gets stronger as he gets angrier however, he's only the strongest in theory. In practice, because his strength is never the same at any given moment, there are tons of people whose physical strength can far exceed Hulk's own at the time, as Zeus demonstrates◊ while at other times he can easily overcome people who are explicitly stronger than those who previously handed him his ass, like Juggernaut, Thor, or Zeus' own son, Hercules. Marvel guidebooks and people In-Universe label Hulk's strength "incalculable◊"
Another time he lifted a whole mountain range of granite◊ (probably similar weight to mountain above) and threw it effortlessly.
Jean Grey once unlocked Hulk's full potential (by using telepathy to turn off the rational part of Hulk's mind that contained Bruce Banner), which caused Savage Hulk to go wild and smash◊ Onslaught's armour destroying his physical presence.
Unlike her cousin Bruce, She-Hulk doesn't get stronger when she's angry. However, her strength when she's "hulked out" is exponentially proportional to her strength as a normal human. She-Hulk's original limit was 85 tons but like other examples she been shown to lift far greater weights. A month of exercise and an extra pound or two of muscle mass can make her as strong as the Hulk at baseline; too bad for her she never goes to the gym except to show off when she's already big and green. She-Hulk's feats include using the maximum setting◊ on a weight machine designed for The Thing, flipping◊ a giant over, swung a T-Rex around◊ like Bowser protecting a little boy, held a bridge◊ together and once ripped The Visionapart◊.
Betty Ross when she's transformed into the Harpy. As Red She-Hulk her super strength goes off the charts, in World Breaker Hulk she is equal to her former love Bruce/Hulk and can shatter a whole planet when she clashes with him.
Red Hulk, though he can't reach the levels Banner can when not enhancing his powers by absorbing energy.
Hulk's villain Abomination possesses vast superhuman strength. Although the Abomination's strength surpasses that of certain classic incarnations of the Hulk such as Mr. Fixit or the Green Savage Hulk, his strength does not fluctuate like the Hulk's.
Thor's strength is immense, and the superbeings who can match him can be counted on the fingers of one hand (not counting cosmic entities). Besides the thunder, Thor is also the Asgardian God of Strength, and as such he is physically the strongest of the Asgardian gods especially due wielding Mjölnir and other OP weapons. His feats include:
The Juggernaut... sighbitch. But seriously whenever strength is measured in the Marvel Universe Cain Marko aka The Juggernaut's name is synonymous with The Hulk when it comes to the standard, Juggy's punches had the power to cause 4 point 8 magnitude earthquakes and stopping him is literally nigh-impossible thanks to power of Cyttorak. Spider-Man buried him in cement but Juggernaut after a few weeks (he doesn't need air or food) dug through the Manhattan bedrock to escape◊. Marko is strong enough to beat up Thing◊, Thor◊, World Breaker Hulk (who only won by exploiting Jugs "unstoppablness") and even kicked King Hyperion◊'s ass who is a SupermanExpy. Juggernaut can also shatter literal dimensions◊ with his strengh alone, however he isn't quite a Invincible Villain since his mind is susceptible to Telepaths and Cyttorak who blesses him with his strength, can take away Marko's power anytime if unsatisfied with him.
The Thing, from the Fantastic Four, can officially lift 85 tons, which isn't too shabby considering his original limit was "only" five tons. Despite this, he has achieved vast feats of strength that would require his power to be several orders of magnitude higher. A future version of him once easily beat him and said that he would continue getting◊ Stronger with Age. Ben notably is something of a measuring pole for the Marvel Universe's top strongmen: If you can defeat him, you're part of the top brass. While he's still overshadowed, few Marvel Characters can claim to having punched out Hulk, Thor◊ and Namor◊ in their lives like Ben can.
You'd expect a skeleton dressed in leather like Ghost Rider to be kinda frail but due to thanks supernatural powers GR is much, much stronger than he looks able to lift 25 tons under normal circumstances (though he if desired he could, given the divine nature of Ghost Rider's power increase that estimation to incalculable limits). In fact Ghost Rider is even considered in the same category as the Incredible Hulk when it comes to sheer power, Depending on the Writer Ghost Riders's strength fluctuates being only able to lift cars◊ while some Riders can lift cranes◊ (the average crane weighs 19.8 tons).
Alejandra Jones has less strength feats and can only lift a measly 5 tons however she possesses Johnny Blaze's Spirit of Vengeance meaning she can raise that limit much higher. Hell she's even ripped Mephisto's heart out◊.
Not to mention Colossus gets even stronger with buffs like the power of Cyttorak aka becoming The Juggernaut or being imbued with the Phoenix Force.
Writers bounce back and forth over whether or not Wolverine himself has Super Strength or not. He was originally conceived as having strength roughly equal to Spider-Man's, and is often shown doing things that a normal human being shouldn't physically be able to do (e.g lift 2 tons◊), but that could simply cross into Charles Atlas Superpower. At any rate some writers say he has low level super strength, others say he doesn't technically have it as a power, but as a by-product of his indestructible bones and healing factor, he can exert more strength than a human would without injuring himself. Though you could argue lifting and throwing a talking bear◊ who weighs 955 lbs cements you in this trope better than anything else.
Sunspot has the mutant ability to convert sunlight into physical strength. Originally his limit was stated at 2 tons, but has increased over the years to 50 tons. After the Inhumans released their Terrigen Mists on the world, Sunspot contracted the M-Pox illness. This put his powers into overdrive, which caused him to, in his own words, become 'the strongest mutant on Earth'. How strong? Comparable to the Physical God Hercules, whom he worked with to steady a machine that bore the weight of the entire planet. Downside being that using his power to that level burns up his lifespan.
This may be not that egregious, as Mr Fantastic early on figures out Gladiator's strength is tied to his confidence meaning on a good day Gladiator can beat up Marvel's top brass, but if his ego is shattered he'll get curb stomped by almost anyone.
Spider-Man has the proportional strength of a spider which means he can lift approximately 10 tons (which might seem small, but a car is roughly 1 and a half tons so he can lift about six of them). Spidey can punch through steel and concrete effortlessly, pick up and crush a truck with his bare hands◊, and less we forget K.O a mutant T-Rex in one hit◊. Peter has to actively hold back to avoid killing the thugs he pummels on a daily basis. His strength was boosted to 20 tons following The Other, but this was reverted following One More Day. It's worth noting that while 10 tons may be the official statistic, Spider-Man has lifted far greater weights and on occasion struggled with far lighter ones, with Depending on the Writer being in effect even more than is traditional for comics. One comic can depict him struggling with someone with lower Super Strength (e.g Captain America), and another had him literally support the weight of most of the Daily Bugle◊ and lifting a 20 ton subway train while thoroughly pissed off◊.
One time when a private plane was gonna crash, Spider-Man literally gets outside while it's still flying and forces the landing gear out and then like the glorious nerd he is Spidey measures the weight of the plane 75,000 pounds and it's fuel 30-40,000 pounds combined with the thrust and Spider-Man is supporting 155,000 pounds aka 57.5 tons. The equivalent of lifting eight African elephants at once (or six T-Rexes).
One of the greatest Spider-Man moments of all time concerns a feat of strength, in "If This Be My Destiny". Aunt May is dying, and Spider-Man is desperately searching for a cure. But then a important ingredient is stolen by the "Master Planner" (actually Doc Ock). Spider-Man goes on a brutal rampage, storming the villain's underwater HQ and smashing it apart. But he ends up collapsing the building, trapping himself under a gigantic mound of debris (estimated 129.8 tons). The cure is right in front of him, but it seems like there's nothing he can do. But Peter Parker swears he will not be responsible again for the death of his loved ones and with all his strength lifts it up.
And Then— As agonizing ache in his limbs seems unendurable— As his superbly muscled body suffers the torment of virtually indescribable ordeal— Out from the pain— Out from the agony— comes '''TRIUMPH!'''◊.
Venom, being a combination of a human host and a Symbiote that mimicked Spideys powers, was originally stated to be slightly stronger than Spidey, although as years passed Venom got some serious power boosts. Even before that, a weakened Venom once supported a weight that Death Battle estimated to be about 200 tons.
Spidey's villain Rhino is able to lift more than 75 tons and up to 100 tons with his suit on. He has on occasion, however, held his own against the far stronger Hulk, and while empowered by a magic stone was even able to almost kill Thor once. Earlier on, Thor had beaten a similarly empowered Thing.
While amped up with the Carnage Symbiote, Osborn was so strong Spider-Man was willing to rebond with Venom to battle him. Once the Goblin mortally wounded Flash Thompson, whom both Peter and the Venom Symbiote care for, Venom-Spidey punched Norman across several street blocks, throughseveral buildings, Superman-style◊.
Worth noting this is just the strength of his "regular" armors, The Hulkbuster suit does Exactly What It Says on the Tin and can match◊ the Jolly Green Giant, a later model can even knock around◊ World Breaker Hulk thanks to not only to the rocket powered fists◊ but thanks to the suit having enough power to run an entire continent. However like all Tony's armour Hulkbuster isn't perfect and Immortal Devil Hulk made short work◊ of Tony's latest model.
Often overlooked but Black Panther also possesses enhanced strength thanks to eating the heart shaped herb, putting his strength somewhere slighty above Captain America's and well below Spider-Man's. T'challa can stop a charging Rhino◊ who go 50 kilometers per hour and can weigh over 5,000 lbs. But it doesn't stop there in another comic Black Panther stops a ramming Elephant meaning T'challa can withstand 10,000 lbs, Black Panther also has enough sheer muscle power to throw◊ Wolverine at Iceman, Gambit, Rogue, Havoc and Polaris like he's bowling. This exceptionally impressive as with the Adamantium skeleton Wolverine weighs over 300 lbs, T'challa can also throw Vibranium spears with enough strength to break through solid stone which requires 20,000 psi.
The Sentry who has "the power of one million exploding suns" is often dubbed Marvel's Superman and in a universe already full with Flying Bricks that's saying something. Sentry's feats range from just holding up a helicopter◊ to holding up a freaking◊ Helicarrier (fans estimate Helicarriers weigh over 100,000 tonnes). Sentry has humiliated heavy hitters such as Thing◊, Thor◊ and Terrax and quite literally took Ares The God of War apart◊. Sentry's greatest feat of strengh is equaling Green Scar Hulk in combat, as for who lost that fight the answer is: Manhattan since most of it destroyed in Sentry and Hulk's fight. Even when undead, Sentry could still give Thor a very hard time.
This is a standard power for many of the heroes of Astro City. Of particular note is Cleopatra II, who has super-strength although her predecessor did not.
The Asterix comic books are about a village of Gauls who fend off the Roman empire with the aid of a magic potion that grants them the power to send Roman legionaries flying with their punches. Asterix's friend Obelix doesn't get a dose of the potion when all the other villagers are lining up for it, since he fell into the cauldron as a baby, an event which increased his strength permanently.
On one occasion only Obelix was given a tiny dose... so that he could punch his way out of a pyramid.
Most of the protagonists and a few villains in Sin City have crazy strength and ridiculous endurance. Marv is the main example capable of breaking doors open, crushing skulls, ripping steel bars off walls and overpowering Manute a man even larger than himself. John Hartigan is just as impressive since he was pushing 60 but still capable of punching a man's skull into bloody chunks in Extreme Mêlée Revenge.
All of the enhanced humans in Strikeforce: Morituri have above-normal human strength as a side effect of the process. Marathon had a variation where his strength grew the longer he refrained from using it, while Brava had strength exceeding that of the other Morituri.
The Tick has "the proportional strength of a tick his size who engages in routine exercise".
Atomic Robo is significantly stronger than a human, with nearly a century's experience of hunting weirdness and access to super-science weapons that invariably break and force him to slug his way out. He'd still have a hard time taking Jenkins in a fight, though.
Wildstar has this in the "Sky Zero" four-parter, as he is seen crushing a tank simply by jumping on it.