Atty. Thomas Patrick Hanrahan

Atty. Thomas Patrick Hanrahan

Thomas Patrick Hanrahan is a lawyer practicing antitrust/competition, complex commercial litigation, products liability and 8 other areas of law. Thomas received a B.A. degree from Fordham University in 1972, and has been licensed for 51 years.

Los Angeles Los Angeles 51 yrs experience 51 year
Call (424) 480-5046 Book Appointment

Profile Summary

About Thomas Patrick Hanrahan at a glance

Thomas Patrick Hanrahan is a Partner based in Los Angeles, California, practicing at Sidley Austin LLP. They have 51+ years of legal experience, licensed to practice since 1975. Their practice focuses on business, class action, product liability, litigation, and consumer. Admitted to practice in Illinois (1975), California District Court, Northern District of Illinois U.S. District Court, Eastern, Northern, Cen (1983), and U.S. Court of Appeals, Ninth Circuit U.S. Court of Appeals, Fifth and Seventh Circuits (2003). Educated at Columbia University School of Law (J.D., 1975) and Fordham University (B.A., 1972). Serands clients in Los Angeles, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Thomas Patrick Hanrahan is a lawyer practicing antitrust/competition, complex commercial litigation, products liability and 8 other areas of law
  • Thomas received a B.A. degree from Fordham University in 1972, and has been licensed for 51 years
  • Thomas practices at Sidley Austin LLP in Los Angeles, CA

Practice Areas Explained

Thomas Patrick Hanrahan's Areas of Practice

Each practice area below reflects the types of cases Thomas Patrick Hanrahan 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.

Thomas Patrick Hanrahan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Class Action

Thomas Patrick Hanrahan is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys in California →

Product Liability

Thomas Patrick Hanrahan is one of 66,193 product liability attorneys indexed nationally. Browse product liability attorneys in California →

Civil Litigation

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

Thomas Patrick Hanrahan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Consumer Protection

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

Thomas Patrick Hanrahan is one of 50,607 consumer attorneys indexed nationally. Browse consumer attorneys in California →

Jurisdictional Context

Why local counsel matters in California

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

Looking for additional California attorneys? Browse all attorneys in Los Angeles or all attorneys in California.

Frequently Asked

Common questions about Thomas Patrick Hanrahan

Where is Thomas Patrick Hanrahan's law office located?
Thomas Patrick Hanrahan's law practice is located in Los Angeles, California. The firm is Sidley Austin LLP. You can contact the office directly through this profile page.
What practice areas does Thomas Patrick Hanrahan handle?
Thomas Patrick Hanrahan focuses on business, class action, product liability, litigation, consumer. Each practice area listed reflects experience handling cases of that type in California.
How long has Thomas Patrick Hanrahan practiced law?
Thomas Patrick Hanrahan has 51+ years of legal experience and has been licensed since 1975.
Where did Thomas Patrick Hanrahan go to law school?
Thomas Patrick Hanrahan earned their education at (J.D., 1975); (B.A., 1972).
How can I contact Thomas Patrick Hanrahan for a consultation?
You can contact Thomas Patrick Hanrahan 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.
Columbia University School of Law
- 1975
B.A.
Fordham University
- 1972

Bar Admissions

Illinois
Admitted: 1975
California District Court, Northern District of Illinois U.S. District Court, Eastern, Northern, Cen
Admitted: 1983
U.S. Court of Appeals, Ninth Circuit U.S. Court of Appeals, Fifth and Seventh Circuits
Admitted: 2003

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