Lec
- Apollo program
- CCL16
- Climate Change Levy
- Czochralski process
- Deltona, Florida
- Formal equivalence checking
- Giżycko
- LEC Refrigeration
- LEC Refrigeration Racing
- Lake City (Amtrak station)
- Lake Erie College
- Lancaster Environment Centre
- Lao Evangelical Church
- Laredo Entertainment Center
- League of Legends
- League of Legends EMEA Championship
- Lech (disambiguation)
- Leck (disambiguation)
- Lee–Enfield
- Legal Education Certificate
- Lek (disambiguation)
- Levelised energy cost
- Light emitting capacitor
- Light-emitting electrochemical cell
- Line echo cancellation
- Little East Conference
- Living Enrichment Center
- Local enterprise company
- Local exchange carrier
- Lonsdale Energy Corp
- LucasArts
- Lyonia Environmental Center
- Stanisław Jerzy Lec
- Stari Lec