How old is too old to be trick-or-treating? Many parents told Yahoo that there is no age limit, and perhaps the only cutoff is becoming a parent yourself. Alexandrina Aguirre-Schilke, from Holly Springs, Georgia, says, “I know a lot of parents think high schoolers are too old to be trick-or-treating, but I don’t think so. The oldest [trick-or-treaters] I have seen are 14 or 15 years old anyway. These kids could be doing god-knows-what, and if they still want to trick-or-treat, I think it’s totally fine. They shouldn’t be turned away because some people think they’re too old. They’re still kids.” Brett Bernstein is a community resourced unit supervisor at the Pima County Sheriff’s Department in Tucson, Arizona, says if your teen is heading out for their first Halloween alone, he suggests having a plan in place beforehand, and agreeing on a specific time when teens should return home.