How Old do Kids Need to be to Stay Home Alone?

There are two states that have enacted legislation regarding children staying home alone. In Illinois, a child must be at least 14 to be left unsupervised. In Maryland, all children under 8 years old must have someone aged 13 or above to watch over them. No other states have laws regarding what age someone has to be to be left alone, but many states and municipalities have guidelines they suggest adults follow in regards to leaving children home unsupervised.