Atty. Dennis G. Lyons

Atty. Dennis G. Lyons

Mr. Dennis G.

Washington Washington 71 yrs experience 71 year
Call (771) 244-1984 Book Appointment

Profile Summary

About Dennis G. Lyons at a glance

Dennis G. Lyons is a business, securities, litigation, consumer, and appellate attorney based in Washington, District of Columbia. They have 71+ years of legal experience, licensed to practice since 1955. Admitted to practice in District of Columbia (1955), New York (1956), and U.S. Supreme Court (1960). Educated at Harvard University (LL.B., 1955) and College of the Holy Cross (A.B., 1952). Recognitions include AV Preeminent. Active member of American Law Institute. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. Dennis G. Lyons is a lawyer practicing corporate, securities, litigation and 3 other areas of law
  • Dennis received a A.B. degree from College of the Holy Cross in 1952, and has been licensed for 71 years
  • Dennis practices in Washington, DC

Practice Areas Explained

Dennis G. Lyons's Areas of Practice

Each practice area below reflects the types of cases Dennis G. Lyons handles, with a brief overview of what that area of law covers.

Business & Corporate Law

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

Dennis G. Lyons is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

Securities Law

Dennis G. Lyons is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in District of Columbia →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Dennis G. Lyons is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →

Consumer Protection

Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.

Dennis G. Lyons is one of 50,607 consumer attorneys indexed nationally. Browse consumer attorneys in District of Columbia →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

Dennis G. Lyons is one of 86,319 appellate attorneys indexed nationally. Browse appellate attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

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

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about Dennis G. Lyons

Where is Dennis G. Lyons's law office located?
Dennis G. Lyons's law practice is located in Washington, District of Columbia. You can contact the office directly through this profile page.
What practice areas does Dennis G. Lyons handle?
Dennis G. Lyons focuses on business, securities, litigation, consumer, appellate. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Dennis G. Lyons practiced law?
Dennis G. Lyons has 71+ years of legal experience and has been licensed since 1955.
Where did Dennis G. Lyons go to law school?
Dennis G. Lyons earned their education at (LL.B., 1955); (A.B., 1952).
How can I contact Dennis G. Lyons for a consultation?
You can contact Dennis G. Lyons 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 Dennis G. Lyons received?
Dennis G. Lyons's notable recognition includes: AV Preeminent.

Education

LL.B.
Harvard University
- 1955
A.B.
College of the Holy Cross
- 1952

Awards

AV Preeminent

Bar Admissions

District of Columbia
Admitted: 1955
New York
Admitted: 1956
U.S. Supreme Court
Admitted: 1960

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