Number of states mandating automobile insurance
In the US, 47 states and the District of Columbia require that motor vehicle drivers have auto insurance.
New Hampshire probably has the least amount of requirements -- and it still requires that you immediately show proof of financial responsibility if you've been involved in a car accident.
Mississippi (MS): Of the three states, Mississippi has the simplest laws that govern not having vehicle insurance. What is posted acts in a sense as insurance in case the driver is the cause of the accident because what is deposited will be used to pay for damages and injuries sustained.
New Hampshire (NH): The owners of motor vehicles must satisfy a requirement that is personal in nature.
No, all states do not require car insurance, but all require financial responsibility to operate a vehicle on the roadway.
Every state requires that you meet financial responsibility requirements through insurance, a bond or some other approved means that show you are able to pay if you cause damages to another person or property in an automobile accident.