Nathan A. Duncan was born in Provo, Utah and raised in California. He received his Bachelor of Arts degree in philosophy from Brigham Young University in 2004. He subsequently attended law school at the University of Missouri-Columbia where he earned his Juris Doctorate degree in 2007.

Nathan is a member of the J. Reuben Clark Law Society and the National Trial Lawyers Association Top 40 under 40. He is also a member of the 30th Judicial Circuit Bar Association and the Missouri Bar. He is also admitted to practice before the U.S. District Court, Western and Easten Districts of Missouri. Nathan is a trial lawyer who practices in the areas of personal injury, class actions, consumer rights, employement law, and criminal defense.

Nathan married Rebecca Goodman of South Greenfield, Missouri in 2001. Nathan and Rebecca have five children: Mackenzie, Tyler, Avery, Cole, and Tanner.