Atty. William Patrick O'Neill

Atty. William Patrick O'Neill

Mr. William Patrick O'Neill is a lawyer practicing admiralty & maritime, antitrust & trade law, bankruptcy & debt and 4 other areas of law.

Washington Washington 50 yrs experience 50 year
Call (771) 216-9296 Book Appointment

Profile Summary

About William Patrick O'Neill at a glance

William Patrick O'Neill is a Partner based in Washington, District of Columbia, practicing at Latham & Watkins LLP. They have 50+ years of legal experience, licensed to practice since 1976. Their practice focuses on business, bankruptcy, m&a, and maritime. Admitted to practice in Illinois (1976) and District of Columbia (1982). Educated at University of Michigan Law School (J.D., 1976) and University of Kansas (B.A., 1973). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. William Patrick O'Neill is a lawyer practicing admiralty & maritime, antitrust & trade law, bankruptcy & debt and 4 other areas of law
  • William received a B.A. degree from University of Kansas in 1973, and has been licensed for 50 years
  • William practices at Latham & Watkins LLP in Washington, DC

Practice Areas Explained

William Patrick O'Neill's Areas of Practice

Each practice area below reflects the types of cases William Patrick O'Neill 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.

William Patrick O'Neill is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

Bankruptcy & Debt

A bankruptcy attorney can help you eliminate debt, stop creditor harassment, and protect your home through Chapter 7 or Chapter 13.

William Patrick O'Neill is one of 105,321 bankruptcy attorneys indexed nationally. Browse bankruptcy attorneys in District of Columbia →

Mergers & Acquisitions

William Patrick O'Neill is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in District of Columbia →

Maritime & Admiralty Law

Maritime attorneys for Jones Act claims, longshore injury, cruise ship cases, and offshore matters.

William Patrick O'Neill is one of 11,568 maritime attorneys indexed nationally. Browse maritime 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 William Patrick O'Neill

Where is William Patrick O'Neill's law office located?
William Patrick O'Neill's law practice is located in Washington, District of Columbia. The firm is Latham & Watkins LLP. You can contact the office directly through this profile page.
What practice areas does William Patrick O'Neill handle?
William Patrick O'Neill focuses on business, bankruptcy, m&a, maritime. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has William Patrick O'Neill practiced law?
William Patrick O'Neill has 50+ years of legal experience and has been licensed since 1976.
Where did William Patrick O'Neill go to law school?
William Patrick O'Neill earned their education at (J.D., 1976); (B.A., 1973).
How can I contact William Patrick O'Neill for a consultation?
You can contact William Patrick O'Neill 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.
University of Michigan Law School
- 1976
B.A.
University of Kansas
- 1973

Bar Admissions

Illinois
Admitted: 1976
District of Columbia
Admitted: 1982

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