KRL may refer to:
- Kahuta Research Laboratories (KRL) - Pakistani military research and development facility
- Knowledge Representation Language - a frame-based programming language
- Kinetic Rule Language - a rules-based event programming language
- Kuka Robot Language - a programming language used for KUKA robots
- KRL Jabotabek - commuter rail service in Jakarta and its surrounding areas.
- Kochi Refineries Limited, an oil refinery in India
- Karelian language's ISO 639-3 & ISO 639-2 code