Hacking may refer to:
- Computer hacking, including the following types of activity:
- Hacker (programmer subculture), activity within the computer programmer subculture
- Hacker (hobbyist), to heavily modify the software or hardware of one's own computer system
- Hacker (computer security), to access computer networks, legally or otherwise
- Computer crime
- Illegal taxicab operation
- Pleasure riding, horseback riding for purely recreational purposes
- The act of stealing jokes
- Hacking, an area within Hietzing, a municipal district of Vienna, Austria
- Ian Hacking, Canadian philosopher of science
