Dedicated To Defending Your Rights
At Olson Law Firm, PLLC, we are here for you during what may be the most difficult time of your life. Whether you are accused of a crime, are considering divorce, or have a legal issue relating to your family, our lawyers can provide practical help. They bring their extensive knowledge of South Dakota’s state, tribal and federal legal systems, along with vast courtroom experience, to bear on each case.
Defending the rights of individuals and families in Sioux Falls and Minnehaha County
Sioux Falls Criminal Defense And Family Law Attorneys
At Olson Law Firm, PLLC, we are committed to your cause. We focus on criminal charges and family law problems. Our two experienced, hardworking attorneys are compassionate toward each client and have the courtroom drive it takes to succeed.
At each step in your case, we will thoroughly explain your rights and what to expect from the legal process. We will never leave you wondering about what is happening – and we will respond to your calls and emails promptly.
Family Law
Divorce
Child Custody
Criminal Defense
Drug Charges
DUI
Staunch Defenders In State And Federal Criminal Courts
If you have been charged with a crime, you need dedicated help right away. Whether you are facing a relatively simple charge like DUI or you are accused of a complex federal conspiracy, attorneys Janet Olson and KyLee Manthei are up for the challenge. They are qualified to take on any criminal case, from underage drinking to murder.
We know how stressful criminal charges can be. There is a lot at stake, and your rights matter. Never plead guilty without advice from a good lawyer. Ours know how to build a strong defense, and they are passionate about doing so.
Meet Our Attorneys

Janet Olson
Janet Olson has 20 years of experience representing people in South Dakota’s state, tribal and federal courts. She focuses on criminal and juvenile defense and all aspects of divorce and family law.

KyLee Manthei
Licensed in both South Dakota and Minnesota, KyLee Manthei handles divorce and family challenges, including in tribal courts. She also defends people in criminal cases.
Caring Guides Through Divorce And Other Family Legal Issues
Both of our attorneys have strong backgrounds in divorce and family law. They provide knowledgeable help with legal issues ranging from fault-based and no-fault divorce to child custody disputes, paternity, adoptions and guardianships.
Attorney Janet Olson spent nearly a decade as a child support referee and can take on any child support case, no matter how complex. Both of our lawyers are experienced with cases involving the Indian Child Welfare Act. They both handle protection orders for domestic violence and Child in Need of Supervision (CHINS) cases.
From your first meeting to each and every step of your case, our legal team will stand by you, providing both thoughtful support and practical advice.
Reach Out For Help Today
At Olson Law Firm, PLLC, we know that your legal issue is of the utmost importance in your life. We will make your concerns our priority. Arrange a consultation at our Sioux Falls office or at a location convenient to you. Call 605-961-5206 now or email us using the form below.
We’re here to help you with your legal problem.
