DUI Laws by State

Driving under the influence (DUI) laws prohibit operating a motor vehicle while impaired by alcohol or drugs. Penalties vary by state and may include fines, license suspension, jail time, and ignition interlock requirements.

Why DUI Laws Vary by State

The United States has a federal system, which means each state has authority to enact its own laws on most subjects. While federal law sets a floor in some areas, states are free to adopt stricter or different rules. That is why dui laws can look very different depending on where you live or where an incident occurred.

Courts also play a major role. State courts interpret statutes, and appellate decisions can change how a law is applied. Local ordinances may add another layer of regulation in cities and counties.

Common Questions About DUI Laws

Questions We Get Asked

What is the legal BAC limit?

Answers vary by state. Select your state below for localized information, or consult a licensed attorney in your jurisdiction.

What are the penalties for a first DUI?

Answers vary by state. Select your state below for localized information, or consult a licensed attorney in your jurisdiction.

Can you refuse a breathalyzer?

Answers vary by state. Select your state below for localized information, or consult a licensed attorney in your jurisdiction.

How long does a DUI stay on your record?

Answers vary by state. Select your state below for localized information, or consult a licensed attorney in your jurisdiction.

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Important: This page is published for general research and education. It is not legal advice, and it does not create an attorney-client relationship. Statutes are amended often and may contain exceptions. Because outcomes depend on your own facts, speak with a licensed attorney in your jurisdiction about your situation. See the full disclaimer.