How old do children have to be before they can can be left at home for (for the sake of the question) say 2hrs whilst parents are in town shopping? is there a legal answer? no need to peronalise a response, because no doubt people have very different ideas about this subject and i dont want an argument breaking out. so just answer the poll so i can see what is popular for most. i remember being in primary school, and being left at home from 9am-3pm when i was a child because i was ill and my parents had divorced. i guess i was 9 or 10. also, for the sake of the poll, lets assume that all children are of normal health and are adequately intelligent for their age.