There is no legal age for babysitting, however as I have found from searching it seems that most people have not found kids to be mature enough until they are at least over twelve. This would probably be wise, considering that you will want the people you are babysitting for to know that you are old enough in their minds. Also, if something bad happens when you are left alone under the age of 12, it could be considered your parents fault, so I would wait until you are over 12 to babysit.
13 is the legal age for a child to be left alone in the US
There are no legal laws about the age a child may be left alone but a child who is left alone too young could leave the parent liable for negligence or child abuse. A general rule of thumb would be if the child can cook for him/herself or call emergency services.
13
21
12
12
the legal age is 12 to be left alone with siblings. Keep in mind though that even at 12 some children arnt mature enough to be left alone even without having to care for siblings as well.
There is currently not a law that specifies the age a child has to be to stay home alone overnight. It is left up to the parents to decide if their child is mature enough to handle it.
Around 16
8
12
There is no legal minimum age for a child to be left alone in Alberta.