Atty. Gus Kostopoulos

Atty. Gus Kostopoulos

Gus Kostopoulos is a lawyer. Gus received a B.A. degree from University of Illinois in 1995, and has been licensed for 28 years.

Glen Ellyn Glen Ellyn 28 yrs experience 28 year
Call (312) 219-2319 Book Appointment

Profile Summary

About Gus Kostopoulos at a glance

Gus Kostopoulos is an Of Counsel based in Glen Ellyn, Illinois, practicing at Michael P. Mazza, LLC. They have 28+ years of legal experience, licensed to practice since 1998. Admitted to practice in Illinois registered to practice before U.S. Patent and Trademark Office (1998). Educated at DePaul University College of Law (J.D., 1998) and University of Illinois (B.A., 1995). Serands clients in Glen Ellyn, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Gus Kostopoulos is a lawyer
  • Gus received a B.A. degree from University of Illinois in 1995, and has been licensed for 28 years
  • Gus practices at Michael P. Mazza, LLC in Glen Ellyn, IL

Jurisdictional Context

Why local counsel matters in Illinois

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

Looking for additional Illinois attorneys? Browse all attorneys in Glen Ellyn or all attorneys in Illinois.

Frequently Asked

Common questions about Gus Kostopoulos

Where is Gus Kostopoulos's law office located?
Gus Kostopoulos's law practice is located in Glen Ellyn, Illinois. The firm is Michael P. Mazza, LLC. You can contact the office directly through this profile page.
How long has Gus Kostopoulos practiced law?
Gus Kostopoulos has 28+ years of legal experience and has been licensed since 1998.
Where did Gus Kostopoulos go to law school?
Gus Kostopoulos earned their education at (J.D., 1998); (B.A., 1995).
How can I contact Gus Kostopoulos for a consultation?
You can contact Gus Kostopoulos 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

J.D.
DePaul University College of Law
- 1998
B.A.
University of Illinois
- 1995

Bar Admissions

Illinois registered to practice before U.S. Patent and Trademark Office
Admitted: 1998

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