Atty. Corey T. Denevan

Atty. Corey T. Denevan

Corey was born and raised in Sioux Falls, South Dakota. However, he began his professional career on the West Coast in Seattle, Washington.

Sioux Falls Sioux Falls 26 yrs experience 26 year
Call (206) 735-4730 Book Appointment

Profile Summary

About Corey T. Denevan at a glance

Corey T. Denevan is a Founder based in Sioux Falls, South Dakota, practicing at Denevan Falon Joyce Prof. LLC. They have 26+ years of legal experience, licensed to practice since 2000. Their practice focuses on trusts, probate, estate planning, business, and poa. Admitted to practice in South Dakota (2000) and Washington United States District Court for the Western District of Washington United States Distric (2002). Educated at University of Missouri at Columbia School of Law (J.D. Opal, 2000) and Augustana University – Sioux Falls (B.A. Biology, 1996). Recognitions include AV Preeminent. Active member of South Dakota Bar Association Second Circuit Bar Association Washington Bar Association King County Bar Association. Serands clients in Sioux Falls, SD and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Corey was born and raised in Sioux Falls, South Dakota
  • However, he began his professional career on the West Coast in Seattle, Washington
  • He was an assistant vice president and trust officer with one of the nation’s largest financial institutions
  • Corey transitioned to the practice of law at Hertog & Coster, PLLC where he focused on estate planning, probate administration and the representation of non-professional fiduciaries and professional fiduciaries, such as banks, trust companies and guardianship agencies
  • Corey joined Aiken, St. Louis & Siljeg, P.S. as a shareholder, where he continued to manage complex trust, estate and guardianship matters, but also expanded his practice into business planning and succession, real estate transactions, creditor rights and commercial litigation
  • Corey also served as a court-appointed trustee and personal representative in complex and contentious cases
  • Corey was a longstanding member of the Washington State Bar Association’s Real Property & Probate Section and Guardianship and Elder Law Section, as well the King County Bar Association’s Real Property & Probate Section and Elder Law Section
  • Corey served two terms on the executive committee of the King County Bar Association’s Elder Law Section
  • In 2005, Corey was nominated and served as the chair of a committee with judges and court commissioners to draft forms to be used by guardians and trustees to report on their fiduciary activities
  • In 2012, Corey was nominated and served as co-chair of the Washington State Bar Association’s task force to revise the Uniform Durable Power of Attorney Act to reduce the financial exploitation of vulnerable and elderly persons
  • After twelve years on the West Coast, Corey and his wife returned to Sioux Falls to be closer to their families
  • Upon returning to Sioux Falls, Corey served as an adjunct professor at a local university teaching employment law
  • Corey joined Boyce Law Firm, LLP in 2013 and as a partner at the firm he focused on trust litigation representing fiduciaries, beneficiaries, and entities owned by trusts both nationally and internationally
  • He also continues a small estate planning practice and representing family members in guardianship and conservator proceedings
  • Corey is a frequent presenter at continuing legal education seminars for lawyers and is involved in legislative activities
  • In 2020, Corey chased a long-held ambition to start his own business and opened Denevan Law Prof. LLC. where he continues his focus on trust and estate litigation, administration and planning as well as the other areas of law found on this website
  • Professional Associations South Dakota Bar Association Second Circuit Bar Association Washington Bar Association King County Bar Association United States District Court Western District of Washington United States District Court of South Dakota Wealth Counsel International Fraud Group

Practice Areas Explained

Corey T. Denevan's Areas of Practice

Each practice area below reflects the types of cases Corey T. Denevan handles, with a brief overview of what that area of law covers.

Trusts

Corey T. Denevan is one of 104,172 trusts attorneys indexed nationally. Browse trusts attorneys in South Dakota →

Probate

Corey T. Denevan is one of 128,014 probate attorneys indexed nationally. Browse probate attorneys in South Dakota →

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

Corey T. Denevan is one of 226,537 estate planning attorneys indexed nationally. Browse estate planning attorneys in South Dakota →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Corey T. Denevan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in South Dakota →

Power of Attorney

Corey T. Denevan is one of 33,188 poa attorneys indexed nationally. Browse poa attorneys in South Dakota →

Jurisdictional Context

Why local counsel matters in South Dakota

Practicing law in South Dakota. Legal matters in South Dakota are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Sioux Falls are typically filed in the local municipal court or the appropriate South Dakota state district court, depending on subject matter and amount in controversy. An attorney licensed in South Dakota brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in South Dakota courts without local counsel or pro hac vice admission.

Looking for additional South Dakota attorneys? Browse all attorneys in Sioux Falls or all attorneys in South Dakota.

Frequently Asked

Common questions about Corey T. Denevan

Where is Corey T. Denevan's law office located?
Corey T. Denevan's law practice is located in Sioux Falls, South Dakota. The firm is Denevan Falon Joyce Prof. LLC. You can contact the office directly through this profile page.
What practice areas does Corey T. Denevan handle?
Corey T. Denevan focuses on trusts, probate, estate planning, business, poa. Each practice area listed reflects experience handling cases of that type in South Dakota.
How long has Corey T. Denevan practiced law?
Corey T. Denevan has 26+ years of legal experience and has been licensed since 2000.
Where did Corey T. Denevan go to law school?
Corey T. Denevan earned their education at (J.D. Opal, 2000); (B.A. Biology, 1996).
How can I contact Corey T. Denevan for a consultation?
You can contact Corey T. Denevan directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Corey T. Denevan received?
Corey T. Denevan's notable recognition includes: AV Preeminent.

Education

J.D. Opal
University of Missouri at Columbia School of Law
- 2000
B.A. Biology
Augustana University – Sioux Falls
- 1996

Awards

AV Preeminent

Bar Admissions

South Dakota
Admitted: 2000
Washington United States District Court for the Western District of Washington United States Distric
Admitted: 2002

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