.pro (professional) is a top level domain extension intended for use by licensed professionals. The extension was originally launched in June 2004 with registration restricted to lawyers, accountants, doctors and engineers in the US, UK, Germany and Canada.

Following consultation with ICANN, the extension was relaunched in September 2008 with a wider remit to include government licensed professionals in all countries. Registrants self-certify their professional status and agree to .pro terms of use before registration, then provide detailed license information.