PML may refer to:
- Pakistan Muslim League, faction of the Pakistani political parties with similar names
- Partido Movimiento Libertario, libertarian political party in Costa Rica
- Perfectly Matched Layer, numerical truncation methodology
- Peter Max Lawrence, contemporary interdisciplinary artist
- Plymouth Marine Laboratory, an independent NERC research center
- Probable Maximum Loss, term used by property insurance companies
In technology:
- Palm Markup Language, a markup language used for e-books
- Programmable Macro Language, a domain specific language for the customisation of Aveva plant & marine design applications
- Proof Markup Language, a markup language for provenance exchange
- PartnerML, Vodafone's proprietary replacement for Wireless Markup Language
- Physical Markup Language, XML-based language that defines data on objects
- Perfectly Matched Layer, a numerical technique used to prevent artifacts at the calculation boundaries of a simulation space
In medicine:
- Polymorphonuclear leucocyte, white blood cell
- Progressive multifocal leukoencephalopathy, rare and usually fatal disorder
- Promyelocytic leukemia protein, tumor suppressor protein
Locations:
- Pierpont Morgan Library, in New York City
- Pine Mountain Lake, California, private gated community in Groveland, California