Safe drivingQuestion 191 of 229

Up to what age is it illegal to leave a child alone in a vehicle?

  1. 4 years old
  2. 6 years old
  3. 8 years old
  4. 10 years old
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Correct answer: 6 years old

It is illegal to leave a child age 6 or younger alone in a vehicle. A person at least 12 years old can supervise.

Source: California Driver's Handbook (DL 600, California DMV, 2025), Section 8. Safe Driving: Unattended Children and Pets, page 67

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Questions last reviewed: 18 October 2026