There is no national law regarding a child’s minimum age to stay home alone. A few states have set forth an age, such as Oregon (10 years) and Maryland (8 years), but the majority are either completely silent on the issue or offer only recommendations.here is no national law regarding a child’s minimum age to stay home alone. A few states have set forth an age, such as Oregon (10 years) and Maryland (8 years), but the majority are either completely silent on the issue or offer only recommendations.