RTL may refer to:
- RTL Group, a European media group headquartered in Luxembourg and owned by the German conglomerate Bertelsmann.
- RTL's flagship TV channels in Germany, Croatia and Hungary, known as simply "RTL" (& formerly called RTL Television, RTL Televizija and RTL Klub, respectively).
- A radio station in France, also called "RTL".
- RTL Lëtzebuerg, the main TV station in RTL's home country of Luxembourg.
- Other RTL flagship channels: RTL 4 in the Netherlands and RTL-TVI in French-speaking Belgium.