Providing the Highest Quality Legal Services Across Wisconsin for 175+ Years

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175 YEARS OF EXPERTISE

Dempsey Law Firm LLP, established in 1849, is one of Wisconsin's oldest continuously operated law firms. The Dempsey legal team has always provided the highest quality legal services in a skillful and efficient manner. With five offices located in Oshkosh, Fond du Lac, Waupun, De Pere, and Wausau, we serve the Fox Valley, Central Wisconsin, and the surrounding areas.

Dempsey Law proudly serves our clients in the following Practice Areas:

Banking & Finance Law

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Financial law can be complex. With changes in regulatory compliance, lending, collections, and documentation, we’ll help financial institutions navigate the ever-changing financial landscape.

Business Succession Planning

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Business transitions are never easy, but they’re necessary. We work with businesses to develop smooth succession plans that minimize disruption and ensure satisfaction for all parties.

Construction Law

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Navigate the complexities of construction law with confidence with the help of our experienced Wisconsin attorneys. We represent businesses and professionals with contracts, disputes, and risk management throughout the construction process.

Corporate Law

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From startups to established Wisconsin-based companies, we offer proactive legal support for every stage of business. Including contract development, federal and state compliance, and everything in between.

Estate Planning

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Our Wisconsin attorneys can help you draft wills, trusts, and other essential documents to ensure your legacy is honored today and in the future.

Litigation

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When legal disputes arise, you need experienced advocates on your side. Our litigation team represents a range of complex issues. We’re here to protect your interests and pursue practical, effective resolutions in the courtroom.

Municipal Law

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We work with municipalities around Wisconsin to provide full service general counsel representation and to work on special projects.

Real Estate Law

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Our law firm provides strategic legal guidance to protect your real estate.

Trust/Estate Administration & Probate

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Our Wisconsin attorneys support families and personal representatives/trustees during a difficult time, managing estate and trust administration with care and clarity. From probate filings to asset distribution, we guide you through every step.

What Sets Dempsey Law Apart from Other Wisconsin Law Firms

175+

Years of Experience

285+

Years of Combined Legal Experience

Meet Our Experienced Wisconsin Attorneys

At Dempsey Law Firm, we’re more than legal professionals. We’re your neighbors, advocates, and trusted advisors. With deep roots in the Wisconsin communities we serve and a long history of legal expertise, our Wisconsin attorneys provide clear and thoughtful guidance across a wide range of legal needs. Our team specializes in a variety of legal areas, including estate planning, business law, municipal law, and more. 

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Our Wisconsin Law Firm Locations

De Pere

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Fond du Lac

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Oshkosh

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Waupun

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Wausau

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Our Community Involvement

2025 SPONSORSHIPS AND DONATIONS

  • Town of Fond du Lac Fire Department Steak Fry
  • Town of Fond du Lac Fire Department Christmas Party
  • Waupun High School FFA Banquet
  • Unity Walk, De Pere
  • Black River Falls Golf Team
  • Food Allergy Awareness 5K, Wausau
  • Lion’s Club Golf Outing, Sleep in Heavenly Peace, Fond du Lac
  • Jackson Parks & Recreation Department Monte Carlo Night
  • Fond du Lac Police Benevolent Association
  • Waupun Youth Baseball
  • Elwood Memorial Golf Outing
  • Oshkosh North High School FFA
  • Oshkosh West High School FFA
  • Christmas in July Charity
  • Kickin it for Kids, Oshkosh Kids Foundation
  • Oshkosh North Girls Soccer
  • Envision Greater Fond du Lac Casino Night
  • Beacon House
  • Waupun Food Pantry
  • Waupun Holiday Help
  • Oshkosh Area Humane Society
  • Wausau Homeless Shelter

What Our Clients Are Saying

“Responsive, knowledgeable and made me feel like they were truly invested in myself and my company.”

Troy K.

What Our Clients Are Saying

“We have been with Dempsey Law Firm for a couple of years now and they provide excellent services. I would definitely recommend them to anyone.”

MISTY S.

What Our Clients Are Saying

“We have used their service for multiple business transactions. From start to finish (which can be a long process) follow-through and attention to detail have always been present.”

ABBY B.
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Disclaimer: Sending us an email correspondence and the information within does not create an attorney-client relationship between us. If you are not already a client, you should not provide us with information without first speaking to one of our lawyers. If you provide information before we confirm that we are willing and able to consult with you about becoming a client, we may not be able to treat that information as privileged, confidential, or protected information, and we may be able to represent a party adverse to you even if the information you submit to us could be used against you.