Dennis P. Riordan argues People v. Knoller 
in the California Supreme Court
Over the last two decades, Dennis P. Riordan has repeatedly been evaluated as one of the best appellate litigators in California and the nation.  He has argued issues of great breadth and importance in both criminal and civil cases, including several in the United States Supreme Court, and hundreds in state and federal appellate courts around the country.   

​In 1989, California Lawyer Magazine named Mr. Riordan, labeled by his peers the "best criminal appellate attorney around," as one of the state's "Most Respected Lawyers."  Since that time, Mr. Riordan has repeatedly been acknowledged as one of the outstanding litigators in the Bay Area, the state of California, and the entire nation.  In the 2002 edition of his book "Persons and Masks of the Law," Judge John Noonan of the Ninth Circuit Court of Appeals cited Mr. Riordan as the single example of a lawyer who could make a difference on behalf of a defendant in a federal criminal appeal.  

In 1996, California Lawyer listed Mr. Riordan among its "Lawyers of the Year" for his work in first overturning George Franklin's murder conviction in the first case based on "repressed memory" testimony.  That same year, the San Francisco Daily Journal called Mr. Riordan "one of the top criminal appellate specialists in California."  

In 2003, Mr. Riordan won honors from the San Francisco Chronicle as one of the "'Top Ten Lawyers" in the Bay Area, nicknaming him "the Last Hope." In 2005 San FranciscoMagazine described him as one of the nation's top appellate lawyers. The San Diego Union called him "one of the state's top appellate lawyers" following his success in overturning a new trial motion on the corruption convictions of former San Diego councilman Michael Zucchet. In May of 2006, the Sacramento Bee named Mr. Riordan as "one of the nation’s best known lawyers of last resort" in an article concerning his entry into the highly publicized prosecution of Hamid Hayat. In a 2007 article, the New York Times described Mr. Riordan as "one of California's top appellate lawyers... known as a brilliant writer of motions, briefs and jury instructions."

Mr. Riordan has been included in "The Best Lawyers in America" for the past ten years.

He is a 1974 graduate of New York University School of Law, where he was a Root-Tilden Scholar, an Arthur Garfield Hays Fellow, and a member of the Order of the Coif. He has twice been awarded Fulbright Fellowships for the study of law in Spain, and has served as an adjunct professor at both Stanford and the University of San Francisco Law Schools. 
Over the last two decades, Dennis P. Riordan has repeatedly been evaluated as one of the best appellate litigators in California and the nation.  He has argued issues of great breadth and importance in both criminal and civil cases, including several in the United States Supreme Court, and hundreds in state and federal appellate courts around the country.   

​In 1989, California Lawyer Magazine named Mr. Riordan, labeled by his peers the "best criminal appellate attorney around," as one of the state's "Most Respected Lawyers."  Since that time, Mr. Riordan has repeatedly been acknowledged as one of the outstanding litigators in the Bay Area, the state of California, and the entire nation.  In the 2002 edition of his book "Persons and Masks of the Law," Judge John Noonan of the Ninth Circuit Court of Appeals cited Mr. Riordan as the single example of a lawyer who could make a difference on behalf of a defendant in a federal criminal appeal.  

In 1996, California Lawyer listed Mr. Riordan among its "Lawyers of the Year" for his work in first overturning George Franklin's murder conviction in the first case based on "repressed memory" testimony.  That same year, the San Francisco Daily Journal called Mr. Riordan "one of the top criminal appellate specialists in California."  

In 2003, Mr. Riordan won honors from the San Francisco Chronicle as one of the "'Top Ten Lawyers" in the Bay Area, nicknaming him "the Last Hope." In 2005 San FranciscoMagazine described him as one of the nation's top appellate lawyers. The San Diego Union called him "one of the state's top appellate lawyers" following his success in overturning a new trial motion on the corruption convictions of former San Diego councilman Michael Zucchet. In May of 2006, the Sacramento Bee named Mr. Riordan as "one of the nation’s best known lawyers of last resort" in an article concerning his entry into the highly publicized prosecution of Hamid Hayat. In a 2007 article, the New York Times described Mr. Riordan as "one of California's top appellate lawyers... known as a brilliant writer of motions, briefs and jury instructions."

Mr. Riordan has been included in "The Best Lawyers in America" for the past ten years.

He is a 1974 graduate of New York University School of Law, where he was a Root-Tilden Scholar, an Arthur Garfield Hays Fellow, and a member of the Order of the Coif. He has twice been awarded Fulbright Fellowships for the study of law in Spain, and has served as an adjunct professor at both Stanford and the University of San Francisco Law Schools.