The animal that kicks the hardest is the Zebra.
Zebras are the animal that has one of the most powerful kicks.
Zebras Kick with About 3,000 Pounds of Force.
Between the well-known force behind the kick of a red kangaroo and a giraffe, you might be surprised to read that the zebra beats them both.
When threatened, an adult zebra can kill a fully grown male African lion with a single blow to the body.
An animal that has one of the most powerful punches is a Gorilla.
A Gorilla can punch very hard.
The average force of a Gorilla Punch is between 1300 to 2700 lbs of force.
That's a lot more force for a punch than an human can punch at.
The average punch force for an untrained human is around 150 lbs while a trained human boxer has around 750 lbs of force.
So a Gorilla could punch out even the best trained human boxer of they were to get into a boxing match.
It is believed that a gorilla punch is strong enough to shatter your skull with one slam of its arm:/Between 1300 to 2700 pounds of force.
Gorillas on (avg. 400 lbs) have a muscle mass density almost 4 times higher than the most heavily muscled powerful human you know.
Given that bone density and muscle mass of gorillas far exceeds that of humans, a deliberate punch (say, to the head) from a gorilla would probably kill a mere human.
However, gorillas are typically very timid primates and not very aggressive at all, such that they must be provoked to violence.