Why Hire Us? 150+ Years Combined Experience

Learn why our dedicated DUI lawyers and criminal defense attorneys are the right choice for you.

Why We're the Right Choice

Success 12,000+ Criminal Cases Resolved

Over the last 37 years, we’ve helped numerous clients who are just like you.

Meet Our Attorney

Testimonials Our Reviews Say It All

See what previous happy clients have to say about working with Ronald Dinan & Associates.

View Our Endorsements

Consultation Request your free case evaluation!

We welcome all questions and will answer them in a pleasant and helpful manner.

Case Evaluation
  • Why Hire Us?

    150+ Years
    Combined Experience

    Our dedicated DUI & criminal defense attorneys will fight for you.

    Why We're the Right Choice[+]
  • Success

    12,000+ Criminal
    Cases Resolved

    We've been helping clients just like you for nearly four decades.

    Meet Our Attorney[+]
  • Testimonials

    Our Reviews
    Say It All

    Read what satisfied clients have to say about working with our team.

    View Our Endorsements[+]
  • Consultation

    To Speak to an
    Attorney, Call Today!

    We are here to help you through this process. Contact us today!

    Free Case Evaluation[+]

Criminal Defense Attorneys

Representing Clients in Sonoma, Napa, Marin, Lake, Mendocino, and Humboldt Counties

Arrested for a DUI or other crime? Get aggressive, professional, and successful help from a DUI lawyer or criminal attorney with the law firm that serves more clients in DUI and criminal cases than any other law firm North of the Golden Gate Bridge. An experienced criminal defense attorney will get the best result possible in your case by helping you generate the best defenses, avoid going to court, protecting your license and job, and acquiring, if necessary, alternatives to jail.

Our Northern California law firm has over 150 years of combined experience in Sonoma, Napa, Marin, Lake, Mendocino, and Humboldt counties. If you have been arrested or are under investigation, call a DUI attorney or criminal lawyer at Ronald Dinan & Associates now. We welcome all questions or inquiries and will answer them in a pleasant, courteous, and helpful manner. To speak to an attorney, call us today!

Get answers to important DUI questions!

  1. I have been arrested for a DUI! What do I do now?
  2. Now I have a DUI criminal case - what's going on?
  3. Can the DMV or the court really take my license?
  4. DMV - beware of the 10 Day Rule!
  5. Nine important issues to look for in your case
  6. What can an expert DUI lawyer do for me?

If you have been arrested for a DUI, contact an experienced DUI attorney as soon as possible. There are a number of steps that can be taken by both you and your attorney to substantially improve your situation. Most likely, you will have to deal with both the criminal court and DMV. Your attorney will explain this to you in detail. In most cases, we appear in criminal court on behalf of our clients to prevent a DUI matter from interfering with your work, personal obligations, etc. In addition, our representation includes speaking on your behalf and negotiating with DMV hearing officers, judges, and district attorneys.

To get immediate information regarding the new DUI and DMV laws, contact our 24 Hour DUI Helpline
for pre-recorded information about likely consequences of a DUI conviction, potential license restrictions/suspensions, and more.

We are centrally located with offices in Santa Rosa, Napa, San Rafael, Lakeport, Ukiah, and Eureka. We welcome all questions or inquiries and will answer them in a pleasant, courteous, and helpful manner. To speak to an attorney, call us today!

Arrested for a Criminal Case?

  • Investigation
    The police are investigating me - should I talk to them? Should I speak to a criminal lawyer first? Understand the two primary reasons why the police want to talk to you!
  • Criminal Case
    What exactly are my charges? Is there more than one way to make bail? Did police legally arrest me? Was the search of my person, car, or home legal? What are my defenses? Avoid the five biggest mistakes people make in a criminal case!
  • Conviction: Sentencing
    Learn the best ways to prepare for sentencing in every criminal case. Discover the 10 best methods to reduce or eliminate jail time! Available jail alternative programs.
  • Drugs
    Drug Possession/Sale, Drug Manufacturing/Cultivation, Paraphernalia, Proposition 215 Medical Marijuana and Compassionate Use, Drug DUI's, Illegal Search and Seizures, Search Warrants, No-Jail Resolutions, Drug Diversion, Rehabilitation
  • Assault
    Spousal Assault, Domestic Violence, Sexual Assault, Violation of Probation, Failure to Appear in Court, Resisting Arrest, Child Abuse
  • Theft
    Commercial/Residential Burglary, Armed Robbery, Fraud, Embezzlement, Shoplifting, Bad Checks, Credit Cards, Identity Theft, White Collar and Cyber Crimes
  • Other
    DMV Licenses, Fish and Game, Firearms/Weapons, Warrants, Pre-arrest Investigations, Violations of Probation, Failure to Appear in Court, Computer and Internet Crimes
If you have a criminal or DUI problem, one of the best decisions you can make is to speak to our attorneys. Our practice concentrates in the counties of Sonoma, Napa, Marin, Lake, Mendocino, and Humboldt. Our six Bay Area offices are centrally located in the cities in which the courthouses are located, including Santa Rosa, Napa, San Rafael, Lakeport, Ukiah, and Eureka. We welcome all questions and inquiries and will answer them in a pleasant, courteous and helpful manner. To speak with an attorney, call us today!