Just read a 1989 Calvin and Hobbes strip about Calvin being deliberately left home alone, unwisely, for a couple of hours. Calvin is 6.

The NSPCC says there is no set legal age and “while every child is different, we wouldn't recommend leaving a child under 12 years old home alone, particularly for longer periods of time.”

https://www.nspcc.org.uk/advice-for-families/home-alone/

How old were you when your parents first let you be at home alone?

8 or under
39.4%
9-10
27.9%
11-12
16.3%
13 or older, or they still won’t
16.3%
Poll ended at .
Staying home alone

Explore the NSPCC's expert advice on when and how to safely leave your child home alone, including legal guidelines, readiness indicators, and safety tips.

NSPCC

@Nickiquote

I was "in charge of" my sister for an hour or two after school. 8 I think. We really just hung at friends' places.