The Communications Assistance for Law Enforcement Act (CALEA) is a United States wiretapping law passed in 1994, during the presidency of Bill Clinton (Pub. L. No. 103-414, 108 Stat. 4279, codified at 47 USC 1001-1010).

CALEA‘s purpose is to enhance the ability of law enforcement agencies to conduct electronic surveillance by requiring that telecommunications carriers and manufacturers of telecommunications equipment modify and design their equipment, facilities, and services to ensure that they have built-in surveillance capabilities, allowing federal agencies to wiretap any telephone traffic; it has since been extended to cover broadband internet and VoIP traffic. Some government agencies argue that it covers monitoring communications rather than just tapping specific lines and that not all CALEA-based access requires a warrant; this is of course highly controversial.