John Francis Banzhaf III is an American public interest lawyer, legal activist and law professor at George Washington University Law School. He is the founder of an antismoking advocacy group, Action on Smoking and Health. He is noted for his advocacy and use of lawsuits as a method to promote what he believes is the public interest.

The George Washington University Law School is the law school of George Washington University, in Washington, D.C. Established in 1865, GW Law is the oldest law school in the national capital. GW Law has 275 elective courses in business and finance law, environmental law, government procurement law, intellectual property law, international comparative law, litigation and dispute resolution, and national security and U.S. foreign relations law.