• Our Locations

    Located in the heart of Dubuque & Galena, we are your local, independent Certified Public Accountants.

  • Galena

    Our Galena office is located on Spring Street.

  • Dubuque

    Our Dubuque office is located on Locust Street.


March 23, 2020 Update

As most businesses that are considered essential during these trying times, we adapt and make changes in order to continue to provide needed services to our clients, while taking required health precautions.

With that said, we will no longer be accepting face to face appointments with our clients until further notice. We urge our clients to drop off, email (via secure link ~ please check our web page at: www.oconnorbrooks.com), fax or mail your tax documents. When there is a need, our CPAs are taking phone conference consultations. As always, we are here should you have a question.

Our thoughts are with you, be safe.

Our mission is to provide quality professional services which contribute to the growth and success of our clients, our community and our firm while never losing the personal relationships and local identity that are the foundations of our practice.

Financial Reporting

Without accurate and timely reports and record keeping, managing a business or not-for-profit enterprise is akin to driving at night with the headlights turned off. O’Connor, Brooks & Co., P.C. can help with information processing and provide timely and accurate reports


Whether a well-established or start-up enterprise, businesses or not-for-profit organization entities rely on accurate, timely, and insightful financial information in order to maintain and enhance profitability and take full advantage of new opportunities.

Tax Management/Consulting

O’Connor, Brooks & Co., P.C. can assist in the preparation of financial security for loved ones and future generations with effective trust planning. Our experienced professionals can help you navigate the complex and ever-shifting tax laws and regulations to facilitate the process and minimize the tax effect to your beneficiaries.


The selection of the type of business entity to operate can have a large impact on your income tax liability and many other issues resulting from daily operation.

Call Us Today!

Dubuque Office
Galena Office