By DullesMoms, Sept 2025

Check out your county’s/city’s suggested guidelines for how long it might be safe to leave a child unsupervised below.

FAIRFAX COUNTY
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Child Supervision Guidelines

8 yo & younger: Should always be in the care of a responsible person. Children this age should never be left unsupervised in homes, cars, playgrounds, or yards.
9-10 yo: May be ready to be left unsupervised up to 1.5 hours during daylight and early evening hours.
11-12 yo: May be ready to be left unsupervised up to 3 hours during daylight and early evening hours.
13-15 yo: May be ready to be left unsupervised more than 3 hours but not overnight.
16+ yo: May be ready to be left unsupervised overnight for 1-2 days, with a plan in place.

Babysitting Guidelines

10-12 yo: May provide care of other children for up to 3 hours with the help of an adult.
13-15 yo: May babysit infants and children but not overnight.
16+ yo: May watch children overnight.

LOUDOUN COUNTY
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Child Supervision Guidelines

8 yo & younger: Should not be left unsupervised.
9-10 yo: May be ready to be left unsupervised up to 1.5 hours during daylight/early evening.
11-12 yo: May be ready to be left unsupervised up to 3 hours during daylight/early evening.
13-15 yo: May be ready to be left unsupervised more than 3 hours but not overnight.
16+ yo: May be ready to be left unsupervised overnight for 1-2 days with a plan in place.

Babysitting Guidelines

9-12 yo: May act as “Parent Helper” with adult supervision.
13 yo: May babysit for children over age 4 for no more than 3 hours.
14+ yo: May babysit infants and children.

PRINCE WILLIAM COUNTY
Source ∙ Important Disclaimer

Child Supervision Guidelines

8 yo & younger: Should always be in the care of a responsible person. Children this age should not be left unsupervised in homes, cars, playgrounds, or yards.
9-10 yo: May be ready to be left unsupervised up to 1.5 hours during daylight/early evening.
11-12 yo: May be ready to be left unsupervised up to 3 hours during daylight/early evening.
13-15 yo: May be ready to be left unsupervised more than 3 hours but not overnight.
16+ yo: May be ready to be left unsupervised overnight for 1-2 days, with a plan in place.

ARLINGTON COUNTY
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Child Supervision Guidelines

8 yo & younger: Should not be left alone for any period of time. This includes leaving children unattended in cars, playgrounds, and yards.
9-10 yo: Should not be left alone for more than 1.5 hours and only during daylight and early evening hours.
11-12 yo: May be left alone for up to 3 hours, but not late at night or in circumstances requiring adult supervision.
13-15 yo: May be left unsupervised, but not overnight.
16-17 yo: May be left unsupervised for up to two consecutive overnight periods.

Babysitting Guidelines

10-12 yo: May provide care for other children up to 3 hours with the help of an adult.
13-15 yo: May babysit infants and children but not overnight.
16+ yo: May watch children overnight.

CITY OF ALEXANDRIA
Source ∙ Important Disclaimer

Child Supervision Guidelines

8 yo & younger: Should always be in the care of a responsible person. Children this age should never be left unsupervised in homes, cars, playgrounds, or yards.
9-10 yo: May be ready to be left unsupervised up to 1.5 hours during daylight and early evening hours.
11-12 yo: May be ready to be left unsupervised up to 3 hours during daylight and early evening hours.
13-15 yo: May be ready to be left unsupervised more than 3 hours but not overnight.
16 yo: May be ready to be left unsupervised overnight for 1-2 days, with a plan in place.

Babysitting Guidelines

10-12 yo: May provide care of other children for up to 3 hours with the help of an adult.
13-15 yo: May babysit infants and children but not overnight.
16+ yo: May watch children overnight.

WASHINGTON, DC
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DC law defines a child as anyone up to age 18, but it does not specify an exact age at which children may be left alone at home. Parents and guardians are expected to use their own judgment. At the same time, guidance is available to help determine when leaving a child alone may cross the line into neglect.

When the Child and Family Services Agency (CFSA) receives a report of a child left alone, the agency reviews each situation individually. Several factors are considered — the same factors parents and guardians should weigh when deciding whether a child is ready to self-supervise for a period of time.

Age: Infants, young children, and others who require constant care should never be left alone. Generally, the older the child, the lower the risk.
Maturity: Infants and young children are not ready to be unsupervised. Beyond that, parents and guardians must consider the individual child. A trustworthy 12-year-old may manage well at home for an hour while an adult runs an errand, whereas the same situation may not be appropriate for an unruly 17-year-old.
Length of Time: There is a significant difference between leaving a child or teen alone for a couple of hours and leaving them alone all day, overnight, or for several days. In general, shorter periods of time alone carry less risk.
Safety: Families should establish clear ground rules for children who are home alone. Children should know how to reach a parent or guardian, what to do in an emergency, and what steps to take if an adult cannot return home on time. In most cases, thoughtful planning and preparation reduce risk.

Important Disclaimer: These are guidelines — not laws or legal advice (Sept 2025). Click the source link for questions parents can ask themselves when deciding if their child is ready to be left alone. While this content is drawn from public information, it’s important to complete your own independent research. at, what, age, can, I, leave, a, child, alone, how, old, before, home

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