Jonathan Cohn

Partner, Sidley Austin LLP

Jonathan Cohn is a partner based in Washington, D.C., who returned to Sidley after serving for several years as a Deputy Assistant Attorney General in the United States Department of Justice. During his tenure in the Justice Department, Mr. Cohn was in charge of the Civil Division’s Appellate Staff, which represents the federal government in its high-profile civil appeals. He also managed over 200 district court and appellate litigators in the Division’s Office of Immigration Litigation. 

Mr. Cohn personally argued many of the most sensitive and consequential matters for the United States. His clients included the Department of the Treasury, the Food and Drug Administration, and the Department of Defense. His caseload covered administrative law appeals, commercial disputes, national security issues and suits challenging the constitutionality of agency regulations and Acts of Congress. 


J.D., Harvard Law School
B.S., University of Pennsylvania

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Publications and Multimedia
Salazar v. Ramah Navajo Chapter - Post-Argument SCOTUScast
SCOTUScast 04-24-12 featuring Jonathan Cohn
April 24, 2012
Janus Capital Group, Inc. v. First Derivative Traders - Post-Decision SCOTUScast
SCOTUScast 07-18-11 featuring Jonathan Cohn
July 18, 2011
Janus Capital Group, Inc. v. First Derivative Traders - Post-Argument SCOTUScast
SCOTUScast 12-22-10 featuring Jonathan Cohn
December 22, 2010