A power user is a user of computers, software and other electronic devices, who uses advanced features of computer hardware, operating systems, programs, or websites which are not used by the average user. A power user might not have extensive technical knowledge of the systems they use but is rather characterized by competence or desire to make the most intensive use of computer programs or systems.

In enterprise software systems, "Power User" may be a formal role given to an individual who is not a programmer, but who is a specialist in business software. Often these are people who retain their normal user job role but also function in testing, training, and first-tier support of the enterprise software.

Some software applications are regarded as particularly suited for power users and may be designed as such. Examples include VLC media player, a multimedia framework, player, and server, which includes complex features not found in other media player suites.