Colby Lessmann

613 Pierce Street
P.O. Box 1557
Sioux City, Iowa 51102
P: 712-252-3226
F: 712-252-4873

Attorney Profile

Colby M. Lessmann was born and raised in Sioux City, Iowa, and is a graduate of Sioux City North High School. Colby graduated from the University of South Dakota School of Business (B.S., 1996) and School of Law (J.D., 1999). During his law school education, he published a casenote in the South Dakota Law Review (1998) and was both the Managing Editor and the Production Editor for Volume 44 of the South Dakota Law Review (1998-1999). After graduating from Law School, Colby clerked for Justice Robert Amundson of the South Dakota Supreme Court in Pierre, South Dakota. In August 2000, upon completion of his clerkship, Colby returned to practice law in Sioux City, Iowa, where he practices in Iowa, Nebraska and South Dakota in the areas of General Litigation, Estate Planning, Wills, Trusts, Probate, Landlord Tenant Law, and Collections.

  • Iowa State Bar Association – Probate, Property and Trust Law Section (2006-present)
  • Iowa Academy of Trusts and Estate Counsel (2013-present)
  • 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


  • Izaac Walton League of America – Woodbury County Chapter (Board Member) (2015-present)
  • Cubmaster – Cubscout Pack 225 – Immaculate Conception Church (2012-present)
  • 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


  • 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
  • General litigation
  • Estate planning
  • Wills
  • Trusts
  • Probate
  • Business collections
  • Landlord & Tenant Law