Robotnik can refer to:
- a newspaper of the Polish Socialist Party, published in various places and times, with breaks, from 1894 to 2003. Most known versions include:
- Robotnik (1894–1939), a newspaper of Piłsudski's Polish Socialist Party
- Robotnik (1896-1917), a newspaper published in New York by Polish-American adherents of the Polish Socialist Party
- Robotnik (1983–1990), an underground newspaper published by the left wing of the Solidarity movement and later by the reborn Polish Socialist Party
- The Robotnik Family from Sonic the Hedgehog video game series
- Doctor Ivo Robotnik, also known by the alias Doctor Eggman, the main antagonist of the Sonic the Hedgehog
- Professor Gerald Robotnik, the grandfather of Doctor Eggman
- Maria Robotnik, the granddaughter of Gerald Robotnik, and the cousin of Doctor Eggman
- Peasants in the Czech lands (at the time a part of the Austro-Hungarian Empire) who revolted against rich landowners in the late 19th century were called "robotniks," derived from the Czech words for "work" and "forced labor" and an older Slavic term for "slave."
- The word for "worker" in Czech, Polish, and Slovak languages.
- The company Robotnik Automation, specialized in Robotics.