FLP is a three-character combination that may refer to:
- Farmer-Labor Party, a defunct political party in the United States
- Fast Link Pulse used in computer device networking
- Ferrovia Lugano-Ponte Tresa, a railway company in Switzerland
- Fischer, Lynch and Paterson result of the impossibility of distributed consensus under certain conditions
- Fixed line phone
- Foreign Languages Press
- Free Library of Philadelphia
- Restriction fragment length polymorphism
- FLP "FLiPpase", an enzyme used in a biological DNA manipulation technique
- Frustrated Lewis pair, concept in chemistry
- Windows Fundamentals for Legacy PCs
- Fisher-Lynch-Paterson result
- Functional logic programming