Catherine M.A. Carroll


Partner-in-Charge, Washington DC Office

Carroll, Catherine M. A.

Catherine Carroll's practice focuses on appellate litigation in the US Supreme Court and the federal courts of appeals, as well as district court litigation and client counseling in matters raising complex legal questions. She has argued cases before the US Supreme Court and the US Courts of Appeals for the First, Second, Ninth, and District of Columbia Circuits. Ms. Carroll serves as partner-in-charge of the Washington DC office.

Ms. Carroll's practice spans a wide range of issues of federal law. Her recent litigation matters have involved such diverse areas as ERISA, insurance and reinsurance, tax law, antitrust law, foreign sovereign immunity, copyright, and criminal law and procedure. In addition, she frequently represents clients on a pro bono basis in cases raising significant issues of constitutional law and capital habeas procedure.

In 2016 and 2014, Ms. Carroll was named a "Rising Star" by Law360 as one of the top appellate attorneys under 40 years old. 

Prior to joining the firm, Ms. Carroll served as a law clerk to Associate Justice David H. Souter of the US Supreme Court. Previously, she clerked for The Honorable Harry T. Edwards of the US Court of Appeals for the District of Columbia Circuit.

Honors & Awards

Publications & News


March 26, 2018

Congress Enacts Law Clarifying Reach of Warrants for Overseas Data

On Friday, March 23, President Trump signed into law the Clarifying Lawful Overseas Use of Data Act (CLOUD Act), which amends the Stored Communications Act (SCA), 18 U.S.C. § 2701, et seq., to require providers of electronic communication services or remote computing services to produce data sought by the government under the SCA, regardless of whether the data are located within or outside the United States.

October 24, 2017

My Supreme Court Debut: A Birthday I’ll Never Forget

In this article, part of Law360's Expert Analysis series, Catherine Carroll reflects on her first time standing before the US Supreme Court justices.

August 24, 2017

Catherine Carroll Honored Among Diversity Journal's Women Worth Watching

The Diversity Journal has recognized Partner Catherine Carroll on its annual list of Women Worth Watching, which honors executive trailblazers for their passion, potential, and positive influence both inside and outside the workplace.

June 9, 2017

The Legal 500 United States 2017 Recognizes 125 WilmerHale Lawyers Across 28 Practice Areas

The Legal 500 United States has released its 2017 rankings, recommending 125 WilmerHale lawyers—including 12 who are named to its elite “Leading Lawyers” list and two on its “Next Generation Lawyers” list—and 28 practice areas in its 11th edition.

May 30, 2017

The National Law Journal Names WilmerHale Washington DC Litigation Department of the Year

The National Law Journal has named WilmerHale the 2017 Washington DC Litigation Department of the Year in the General Litigation category.

December 28, 2016

WilmerHale Named to The National Law Journal's Appellate Hot List

The winners were selected based on their federal and state appeals court victories in the US during 2016.

April 22, 2016

Catherine Carroll Named an Appellate Rising Star by Law360

WilmerHale Partner Catherine Carroll is one of only six attorneys nationwide named a 2016 Appellate Rising Star by Law360, and one among four WilmerHale partners selected to this year's overall list.

August 4, 2015

When the Supreme Court Comes Calling: WilmerHale Partner Invited to Argue Next Term

Bloomberg BNA reports on the US Supreme Court inviting WilmerHale Partner Catherine Carroll to argue a case.

July 31, 2015

When the High Court Wants Help: A Wilmer lawyer gets the call in a civil rights case

Partner Catherine Carroll speaks about being selected to argue a US Supreme Court case in The National Law Journal article, "When the High Court Wants Help: A Wilmer lawyer gets the call in a civil rights case," published on July 31, 2015. 

June 25, 2014

WilmerHale Secures String of Supreme Court and Federal Circuit Wins

Two US Supreme Court decisions handed down on June 12 mark the latest in a string of victories secured by WilmerHale's Appellate and Supreme Litigation Court Practice during the 2013-2014 term.

Professional Activities

Ms. Carroll serves on the Judicial Division Amicus Committee of the American Bar Association, and is a member of the Edward Coke Appellate Inn of Court.


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JD, magna cum laude, University of Michigan Law School, 2002, Order of the Coif, Michigan Law Review, Campbell Moot Court winner

BA, Government, summa cum laude, College of William and Mary, 1998, Phi Beta Kappa

Bar Admissions

District of Columbia



The Hon. Harry T. Edwards, US Court of Appeals for the District of Columbia Circuit, 2003 - 2004

The Hon. David H. Souter, US Supreme Court, 2004 - 2005

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