QSL may refer to:
- QSL card, card confirming either a two-way radiocommunication between two amateur radio stations or a one-way reception of a signal from a radio, television or shortwave broadcasting station
- Qatar Stars League, highest professional league in Qatari football
- Quantum spin liquid, a state of matter
- Quebec Sign Language, sign language used in Canada
- Queensland State League (association football), statewide semi-professional association football league
- Queensland State League (Australian rules football), Brisbane-based semi-professional Australian rules football league