Sarah Harris focuses her practice on complex appellate litigation. She has represented clients in high-stakes appeals in the U.S. Supreme Court and federal and state appellate courts across the country.  She has argued before the federal courts of appeals and state supreme court.  Her cases have covered a wide range of topics, including constitutional law, administrative law, class actions, antitrust, False Claims Act litigation, products liability, and federal civil procedure.  Sarah has been recognized in the appellate field as a “Rising Star” by The National Law Journal and Super Lawyers and as a “Next Generation Lawyer” by The Legal 500.

Before joining Williams & Connolly, Sarah served as a Deputy Assistant Attorney General in the Office of Legal Counsel at the United States Department of Justice.  She clerked for Justice Clarence Thomas on the Supreme Court of the United States, Judge Laurence Silberman on the United States Court of Appeals for the D.C. Circuit, and Judge Sandra Lynch on the United States Court of Appeals for the First Circuit.

Sarah received her undergraduate degree summa cum laude from Princeton University, and her J.D. magna cum laude from Harvard Law School. She also holds a Ph.D. from the University of Cambridge.

Representative Experience

Though all cases vary and none is predictive, Sarah’s experience includes:

  • Tarrant Regional Water District v. Herrmann, 569 U.S. ___ (2013). Secured decision protecting key western water compacts that do not expressly authorize cross-border diversions.*
  • In Re: Mirena IUD Prods. Liab. Litig., No. 16-2890 (2d Cir. 2017).  Successfully represented Bayer in obtaining affirmance of the dismissal of approximately 1,300 cases in MDL.*
  • Naifeh v. State ex rel. Okla. Tax Comm’n, 2017 OK 63 (2017).  Successfully represented Philip Morris before the Oklahoma Supreme Court in a case challenging the constitutionality of a putative cigarette tax.*
  • Price v. Philip Morris, Inc., 43 N.E.3d 53 (Ill. 2015) (Ill. S. Ct.).  Successfully represented Philip Morris before the Illinois Supreme Court and obtained vacatur of a $10 billion judgment concerning light cigarettes that the lower courts had reinstated.*
  • SmithKline Beecham Corp. v. Abbott Laboratories, 740 F.3d 471 (9th Cir. 2013). Successfully represented GlaxoSmithKline in landmark case finding that the Equal Protection Clause bars peremptory challenges of jurors based on sexual orientation.*

*Representation occurred before Sarah joined Williams & Connolly.




“Rising Star,” The National Law Journal, 2017

“Next Generation Lawyer,” in the category of Appellate, The Legal 500, 2017

“Rising Star” for Washington, D.C. Appellate, Super Lawyers, 2014-2015


Other Government Service

Deputy Assistant Attorney General, Office of Legal Counsel, United States Department of Justice

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