LDP may mean:
Politics
- Liberal Democratic Party (disambiguation), a list of liberal democratic parties
- Laban ng Demokratikong Pilipino, a political party in the Philippines
- Lebanese Democratic Party, a political party in Lebanon
- League for Democracy Party, a political party in Cambodia
- Liberal Democratic Party of Germany, a political party in East Germany
- Liberal Democratic Party (Japan), a political party in Japan
- Liberal Democratic Party (Serbia), a political party in Serbia
Technology
- Label Distribution Protocol, a routing protocol used in Multiprotocol Label Switching networks
- Laserdisc player
- Linked Data Platform, a Semantic Web specification
- Linux Documentation Project
Mathematics
- Large deviation principle, the rate function in mathematics
Locations
- Damansara–Puchong Expressway or Lebuhraya Damansara–Puchong (LDP), an expressway in Malaysia
- Long-distance footpaths in the UK (long-distance paths)
- Lower Duck Pond, a fictional town created by the subreddit of /r/HaveWeMet
Language
- Lingwa de planeta, a conlang mentioned in Worldlang
Other
- Loan deficiency payments, a U.S. agriculture policy farm income support program
- Local Development Plan, a form of town and country planning document in Wales
- Long day plant, a plant that flowers when the night length falls below its critical photoperiod
- Long Distance (Skateboard) Pumping
- Leadership development Program, a type of professional development program for businesses and organizations
- Landed Duty Paid (LDP), a shipping term indicating the seller will import to country of destination and pay duty on goods