Non-magic people, commonly known as Muggles in Great Britain, No-Maj(e)s in the United States among other names, are people who are born to two non-magical parents and are incapable of performing magic. Muggles are not to be confused with Squibs, who also lack magic but are born to at least one magical parent.
Most Muggles have been unaware that magic and the wizarding world exists since the establishment of the International Statute of Wizarding Secrecy, as wizards have organised their own society largely separate from the Muggle world. Exceptions include close relatives of wizards and witches and heads of government (such as the British Prime Minister).