Attorney Colby Lessmann

Attorney Colby M. Lessmann
613 Pierce Street
Sioux City, Iowa 51101
P: 712-252-3226
F: 712-252-4873
Free Consultation
8.0Colby Merlound Lessmann

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AV®, AV Preeminent®, Martindale-Hubbell DistinguishedSM, and Martindale-Hubbell NotableSM are Certification Marks used under license in accordance with the Martindale-Hubbell® certification procedures, standards and policies.

Martindale-Hubbell® is the facilitator of a peer review rating process. Ratings reflect the anonymous opinions of members of the bar and the judiciary. Martindale-Hubbell® Peer Review Ratings™ fall into two categories – legal ability and general ethical standards.

Colby Merlound LessmannClients’ ChoiceAward 2023

Attorney Profile

Attorney Colby Lessmann AEP® is a graduate of the University of South Dakota School of Business (B.S. 1996) and School of Law (J.D. 1999). He is admitted to practice law in the United States Supreme Court, United States Court of Federal Claims, United States Federal Court (Iowa, Nebraska, South Dakota), and United States Appellate Court (8th Circuit), as well as Iowa, South Dakota, and Nebraska state courts. Colby handles estate planning (e.g. wills, trusts, durable and medical powers of attorney, living wills, will contests, special needs trusts, Medicaid trusts a/k/a “Miller Trusts”), probate, real estate property (e.g. purchase agreements, contracts, leases, deeds), landlord-tenant (e.g. evictions, collections), business collections, personal injury (e.g. car accidents, slip and fall accidents, wrongful death claims), guardianships/conservatorships, judgment enforcement and collections, garnishment, business matters (e.g. corporations, nonprofit corporations, limited liability corporations, partnerships, contracts, leases, deeds, succession planning), collection litigation, commercial litigation, and general litigation matters. With Colby, your consultation is always free!

Colby was born and raised in Sioux City, Iowa. Fun fact: Colby is a second-generation Sioux City lawyer. His father practiced law in Siouxland for nearly twenty-five years. In addition to his father, Colby has three other family members who are also attorneys.

During law school, Colby published a casenote in the South Dakota Law Review (1998) and was both the Managing and Production Editor for Volume 44 of the South Dakota Law Review (1998-1999). He clerked with the South Dakota Supreme Court in Pierre before returning to Sioux City to join a private practice. Colby is a member of the Iowa Association for Justice, Iowa Academy of Trusts and Estate Counsel, and Siouxland Estate Planning Council, as well as various state and local bar associations. In 2020, Colby was certified as an Accredited Estate Planner (AEP®) designee by the National Association of Estate Planners & Councils in recognition of his experience, knowledge, education, and professional reputation involving estate planning and probate matters.

Colby has always been an avid athlete. In fact, he lettered in four different sports all throughout high school at Sioux City North – making him one of only three local students who achieved this feat. He received several baseball and academic college scholarships and was awarded All North Central Conference accolades his senior year at USD. Colby continued to play amateur baseball for various teams over his twenty-two-year career, but he was a member of the Vermillion Red Sox for the majority of his career. He won three State Championships, finished runner up one year, and was named to the All-Tournament Team twice.

Colby is also active in the lives of his sons. He coached little league for several years and was Cubmaster for their Cub Scout Pack. He can often be found enjoying any number of outdoor activities with his family or baking some decadent cheesecake. Colby’s athletic background has left him with a strong sense of motivation/focus, perfectionism, and willingness to fight. When you find yourself outmanned in the legal ring, Colby is definitely someone you want in your corner!


  • Iowa State Bar Association – Probate, Property and Trust Law Section (2006-present)
  • Iowa Academy of Trusts and Estate Counsel (2013-present)
  • Siouxland Estate Planning Council, Inc. (2019-present)
  • National Association of Estate Planners & Councils (NAEPC), Member (2020)
  • Nebraska State Bar Association (2002-present)
  • Iowa Association for Justice (2002-present)
  • American Association for Justice (2002-present)
  • Woodbury County Bar Association (2000-present)
  • South Dakota State Bar Association (2000-present)

Civic Leadership

  • Siouxland Community Food Bank – Board Memember (2020-present)
  • Siouxland Center for Active Generations – Board Member (2019-present)
  • Izaac Walton League of America – Woodbury County Chapter, Member (2015-present)
  • Cubmaster – Cub Scout Pack 225 (2012-2020)
  • Siouxland Fly Fisherman’s Club, Member (2014-present)


  • Law School:  University of South Dakota School of Law, J.D., 1999
  • College: University of South Dakota, B.S. Business Administration, 1996

Admitted to Practice

  • State of South Dakota
  • State of Iowa
  • State of Nebraska
  • United States District Court for the Northern District of Iowa
  • United States District Court for the District of South Dakota
  • United States District Court for the District of Nebraska
  • United States Court of Appeals for the Eighth Circuit
  • United States Court of Federal Claims
  • United States Supreme Court

Areas of Practice

  • Estate planning:
    • Wills
    • Trusts
    • Powers of attorney (durable and medical)
    • Living wills
    • Medicaid trusts a/k/a “Miller Trusts”
    • Special needs trusts
  • Probate
  • Will Contests
  • Real estate property:
    • Purchase agreements
    • Contracts
    • Leases
    • Deeds
  • Landlord-tenant
    • Evictions
    • Collections
  • Business collections
  • Personal injury:
    • Car accidents
    • Motorcycle accidents
    • Semi accidents
    • Vehicle-bicycle accidents
    • Vehicle-pedestrian accidents
    • Wrongful death claims
    • Construction accidents
    • Slip and falls
    • Dram shop suits
    • Animal bites
  • Guardianship/Conservatorship
  • Judgment enforcement and collection
  • Collections
    • Garnishments
    • Levies
  • Business law:
    • Corporations
    • Nonprofit corporations
    • Limited liability corporations
    • Partnerships
    • Contracts
    • Leases
    • Deeds
    • Succession planning
  • Collection litigation
  • Commercial litigation
  • General litigation matters

Awards & Recognitions

  • Best Lawyers®: The Best Lawyers in America™ for Trusts and Estates (2024)
  • Best Lawyers®: Best Law Firms for Metropolitan Tier 2 – Sioux City – Personal Injury Litigation-Plaintiffs (2023)
  • Best Lawyers®: Best Law Firms for Metropolitan Tier 2 – Sioux City –Trusts & Estates Law (2023)
  • Best Lawyers®: Top-Listed City Awards for Total Lawyers in Sioux City: 5 lawyers (2023)
  • Best Lawyers®: Best Law Firms for Metropolitan Tier 2 – Sioux City – Trusts & Estates Law (2022)
  • Best Lawyers®: Top-Listed City Awards for Total Lawyers in Sioux City: 4 lawyers (2022)
  • Martindale-Hubbell®: Client Champion – Gold (2022)
  • Martindale-Hubbell®: AV Preeminent® Rating (2021-present)
  • Best Lawyers®: Best Law Firms for Metropolitan Tier 3 – Sioux City – Trusts & Estates Law (2021)
  • Martindale-Hubbell®: Client Champion – Silver (2021)
  • Martindale-Hubbell®: Distinguished® (2020)
  • Martindale-Hubbell®: Client Champion – Silver (2020)
  • National Association of Estate Planners & Councils: Accredited Estate Planner (AEP®) Designation (2020)
  • Avvo: Clients’ Choice Award (2019 and 2023)