Antitrust Act

Antitrust Act can refer to:
 * The Sherman Antitrust Act, first United States federal government action to limit monopolies
 * Sherman Antitrust Act (federal preemption)
 * The Clayton Antitrust Act, enacted to remedy deficiencies in antitrust law created under the Sherman Antitrust Act
 * Hart–Scott–Rodino Antitrust Improvements Act
 * Tunney Act, officially known as the Antitrust Procedures and Penalties Act