ETL may stand for:
- ETL SEMKO (formerly Edison Testing Laboratory)
- Effective Translational Lift, a transitional state present as a helicopter moves from hover to forward flight
- EGF-TM7-Latrophilin-related protein, a.k.a. ELTD1, a G protein-coupled receptor
- Enterprise tape library
- Ephemerides Theologicae Lovanienses
- Essex Terminal Railway, in Canada
- Estimated Time of Landing, in aviation
- Expected tail loss, another term for expected shortfall
- Express Toll Lanes
- Extract, transform, load: a process in database operations - especially in data warehousing
- Extraterrestrial life