LDR may refer to:
People
- Lana Del Rey, American singer-songwriter
Politics
- Liberal Democrat and Reform Party, European Parliament
- Laos Democratic Republic
- Local Democracy Reporter, United Kingdom
Computing
- LDraw filename extension
- Low-dynamic-range rendering in 3D computer graphics
Science
- Light-dependent resistor, a type of electrical component
- Lateral digit reduction in birds
Other
- Loan-deposit ratio
- Long-distance relationship of a couple