Since muggles are non-magical beings then yes, muggles do exist. However, they are not called muggles, they're just real people.
In the Harry Potter series, muggles are non-magical people. So technically speaking, yes muggles do exist because they are just normal people who are not able to cast spells.However, it is important to note that the Harry Potterseries is a work of fiction, and magical people do not really exist.
Muggles. Ordinary people are referred to as Muggles.
No, muggles don't know that magic exists or not
It's never explicitly said in the books, as far as I can remember, but it's a good question—Muggles can't really hurt them, seeing as they're wizards and all. I always figured it had to do with not wanting to freak the Muggles out, and at this point, they're pretty stuck in their ways.
People get into Diagon Alley by:Going through the Leaky Cauldron, which muggles can't really seeFloo powder which muggles cannot useWalking from another magical alleyNote: muggles aren't supposed to know of (let alone get into) Diagon Alley, except if they are related to a wizard or witch, like Hermione's parents.
Easy, muggles cannot see Hogwarts so he did not know it was there. Because Hogwarts is an imaginary place that doesn't exist in reality.
Muggles are non-wizards, that is, common humans who can do no magic.
I think you're thinking about muggles. Muggles are non-magical people.
Muggles have no magical abilities and are born into non-magic families. For the most part, muggles do not know about magic. Wizards can use magic.
Technically she is a muggle born witch. Her parents are muggles. (:
In Harry Potter only non-wizard and non-witch people are muggles so not everyone is a muggle.
Yes, wizards exist. They have just decided that they will be better off hiding from us Muggles. If they were to show themselves we would want them to solve all our problems for us, not to mention that some governments would want to experiment on wizards to find out how come they have magic and Muggles don't. If you ask me, it's better that they are in hiding.