LD
- 1D (disambiguation)
- Air Hong Kong
- Basic oxygen steelmaking
- Binary logarithm
- CP/LD
- Copyright infringement
- County Longford
- Curb Your Enthusiasm
- Day Break
- Degrassi
- Dextrorotation and levorotation
- Dietitian
- ID (disambiguation)
- Julian day
- LD (cigarette)
- LD (rapper)
- LD postcode area
- Lactate dehydrogenase
- Ladder diagram (disambiguation)
- Lakshadweep
- Language Development
- Larry David
- Laser designator
- Laser diode
- LaserDisc
- Lateral dorsal nucleus of thalamus
- Learning disability
- Lemon Demon
- Lethal dose
- Levenshtein distance
- Liberal Democrats (UK)
- Liberal democracy
- Liberian dollar
- Liberty dollar (private currency)
- Libyan dinar
- Light Dragoons
- Lighting designer
- Lil Dicky
- Lincoln–Douglas debate
- Lincoln–Douglas debate format
- Line drive
- Linkage disequilibrium
- Linked data
- Liquidated damages
- Listwise deletion
- Little Doses
- Living Dangerously
- London dispersion force
- Long-distance calling
- Long-distance relationship
- Lord
- Louis Dreyfus Company
- Low-definition television
- Lucid dreaming
- Ludum Dare
- Luis Dubuc
- Lunar distance
- Línea Turística Aereotuy
- Pulse dialing
- Z80