About
John C. Quaintance is a senior attorney at Boyce Law Firm in Sioux Falls with more than fifty years of legal practice. He focuses on business and transactional matters, real estate, and creditor rights for businesses, lenders, and individuals. His work includes business organizations and transactions, commercial lending and finance, contracts, mergers and acquisitions, business succession planning, foreclosures, leasing, development, and other property matters. He provides practical advice built on decades of experience with South Dakota business and real estate clients.
John earned a B.A. in Pre-Law History from the University of South Dakota. He began legal studies at the University of Virginia School of Law and later earned a J.D. with honors from the University of South Dakota School of Law. His education provided a foundation for a career centered on commercial relationships, property interests, lending, and business structures. That training supports careful review of agreements, financing arrangements, ownership issues, and creditor remedies in transactions and disputes.
John has represented businesses, lenders, and individuals across South Dakota and beyond, including many long-term clients. His business practice covers organizations, commercial finance, contracts, creditor rights, mergers and acquisitions, trademarks and copyrights, and succession planning. His real estate work includes commercial and residential transactions, development, foreclosures, homeowners’ associations, land use and zoning, and leasing. His experience allows him to address legal issues that cross business, financing, and property areas rather than treating each matter in isolation.
John C. Quaintance is admitted in South Dakota and before federal trial and appellate courts, including the U.S. Supreme Court. His long career reflects a steady focus on business planning, transactions, real estate, and creditor rights. He helps clients evaluate legal risk, document commercial relationships, protect financial interests, and address problems before they disrupt broader business goals. His decades of practice provide continuity for clients whose business, lending, property, and succession needs develop over time and require coordinated legal guidance.
Law Office Affiliations
- Attorney, Boyce Law Firm LLP
- Member, State Bar of South Dakota
Licensed State
- South Dakota
Education
- University of South Dakota School of Law
Juris Doctor (JD) - University of South Dakota
Bachelor of Arts (BA)
Awards & Badges

- Advertising
- Agriculture
- Banking & Finance
- Business
- Business Litigation
- Closely Held Business
- Contracts & Agreements
- Creditor Debtor Rights
- Land Use & Zoning
- Licensing
- Mergers & Acquisitions
- Real Estate
- Tax





