About

Colby M. Lessmann is a dedicated attorney based in Sioux City, Iowa, where he has cultivated a robust legal practice since the completion of his clerkship with Justice Robert Amundson of the South Dakota Supreme Court. A native of Sioux City, Colby graduated from Sioux City North High School and went on to earn his Bachelor of Science degree from the University of South Dakota School of Business in 1996, followed by his Juris Doctor from the University of South Dakota School of Law in 1999. While in law school, he distinguished himself by publishing a noteworthy casenote in the South Dakota Law Review and serving as both the Managing Editor and Production Editor for Volume 44. Colby’s legal expertise spans multiple areas, including Personal Injury, General Litigation, Estate Planning, Wills, Trusts, Probate, Will Contests, Corporate and Business Law, Landlord-Tenant disputes, and Collections. His practice serves clients across Iowa, Nebraska, and South Dakota, with a strong focus on providing personalized and effective legal solutions. As an active member of the State Bar Associations for Iowa, Nebraska, and South Dakota, Colby is also affiliated with several professional organizations, including the Iowa Trust and Estate Council and the Iowa Association for Justice. He holds licenses to practice in various federal courts, including the U.S. District Courts for the Northern District of Iowa, the District of Nebraska, the District of South Dakota, the U.S. Court of Appeals for the 8th Circuit, the U.S. Court of Federal Claims, and the U.S. Supreme Court. Colby operates his law office from the Historic Williges Building located at 613 Pierce Street, Sioux City, Iowa, where he is committed to delivering high-quality legal representation while prioritizing the needs of his clients.

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