Atty. Mark William Haynes

Atty. Mark William Haynes

Mark William Haynes is a lawyer practicing administrative, business and corporations, elder law and 15 other areas of law. Mark received a B.S.B.A. degree from University of Missouri, and has been licensed for 33 years.

O'Fallon O'Fallon 33 yrs experience 33 year
Call (314) 944-2954 Book Appointment

Profile Summary

About Mark William Haynes at a glance

Mark William Haynes is a wills, trusts, probate, estate planning, and business attorney based in O'Fallon, Missouri. They have 33+ years of legal experience, licensed to practice since 1993. Admitted to practice in Missouri (1993). Educated at Regent University J.D. (—) and University of Missouri B.S.B.A. (—). Serands clients in O'Fallon, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark William Haynes is a lawyer practicing administrative, business and corporations, elder law and 15 other areas of law
  • Mark received a B.S.B.A. degree from University of Missouri, and has been licensed for 33 years
  • Mark practices in O'Fallon, MO

Practice Areas Explained

Mark William Haynes's Areas of Practice

Each practice area below reflects the types of cases Mark William Haynes handles, with a brief overview of what that area of law covers.

Wills

Mark William Haynes is one of 34,541 wills attorneys indexed nationally. Browse wills attorneys in Missouri →

Trusts

Mark William Haynes is one of 104,172 trusts attorneys indexed nationally. Browse trusts attorneys in Missouri →

Probate

Mark William Haynes is one of 128,014 probate attorneys indexed nationally. Browse probate attorneys in Missouri →

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.

Mark William Haynes is one of 226,537 estate planning attorneys indexed nationally. Browse estate planning attorneys in Missouri →

Business & Corporate Law

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

Mark William Haynes is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in O'Fallon are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri 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 Missouri courts without local counsel or pro hac vice admission.

Looking for additional Missouri attorneys? Browse all attorneys in O'Fallon or all attorneys in Missouri.

Frequently Asked

Common questions about Mark William Haynes

Where is Mark William Haynes's law office located?
Mark William Haynes's law practice is located in O'Fallon, Missouri. You can contact the office directly through this profile page.
What practice areas does Mark William Haynes handle?
Mark William Haynes focuses on wills, trusts, probate, estate planning, business. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has Mark William Haynes practiced law?
Mark William Haynes has 33+ years of legal experience and has been licensed since 1993.
Where did Mark William Haynes go to law school?
Mark William Haynes earned their education at (—); (—).
How can I contact Mark William Haynes for a consultation?
You can contact Mark William Haynes 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.

Education

Regent University J.D.
- In Progress
University of Missouri B.S.B.A.
- In Progress

Bar Admissions

Missouri
Admitted: 1993

Reviews

These reviews belong to platform users; they do not constitute advertisement or promotion for the attorney. Opinions are published for informational purposes only.

No reviews yet.