• DUI Defense

    Get Important Information on Drunk Driving

    The more you know about your rights, options, and defenses, the better your final results can be!

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  • Criminal Defense

    12,000+ Criminal Cases Resolved

    Learn about the required elements of your criminal charges and be pro active in your defense

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  • California Crimes

    About California’s Criminal Laws

    From misdemeanors to felonies, we handle all types of criminal cases under California’s Penal Code.

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Napa County Attorney Office

Napa County DUI & Criminal Defense Attorneys

150+ Years of Combined Legal Experience

When facing criminal charges, it is important to know what consequences you may be facing. Misdemeanor and felony charges resulting from a criminal conviction can have serious consequences. If you are planning to take legal action against a criminal charge in Napa County, our criminal defense attorneys may be able to help you in your case. Explore your options with Ronald Dinan & Associates​ today!

Ronald Dinan & Associates
1034 Walnut St.
Napa, CA, 94559
Phone: (707) 507-5064

Napa DUI Defense Lawyers

With more than 12,000 cases successfully resolved, our firm has helped clients with difficult issues involving criminal law. We have vast experience in DUI defense, help clients stay informed about confusing DUI laws and help them understand the potential punishments they could face. If you have been arrested for a DUI, retain the experienced legal counsel of our criminal defense attorneys in Napa. Our California DUI helpline offers quick access to information regarding DUI, and may help you as you prepare to take action.

Seasoned Criminal Defense Firm

Ronal Dinan & Associates has years of experience handling criminal issues, such as:

Whether you are seeking dedicated legal representation in your case or guidance in a legal matter, our criminal defense lawyers in Napa may be able to help you. Our record of success demonstrates our knowledge and ability in taking on complex legal issues and obtaining positive results. Explore your criminal defense options with our legal team today!

Our Offices Serve Clients Throughout Northern California

With offices in Napa and five other cities throughout Northern California, our firm is able to help many clients with their legal issues. Whether you are facing a DUI charge or other criminal offense, explore all of your options as you move forward. With more than 150 years of combined experience, Ronald Dinan & Associates​ may help you work toward a positive outcome in your case. Work with our dedicated legal team to secure your future.


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Get Directions from your location in Napa, St. Helena, Yountville, Calistoga and American Canyon to our Napa Office.

Hours of Operation:

Monday - Friday: 8 AM to 5 PM

In addition to normal business hours, attorneys at our Napa office can be reached evenings and weekends at 707-507-5064.

Ronald Dinan & Associates, Attorneys & Lawyers, Santa Rosa, CA