IPK may refer to:

International Prototype of the Kilogram, an object that was used to define the kilogram IPK Acrylic-polyvinyl chloride, a plastic material Inositol polyphosphate kinase, a family of enzymes Iñupiaq language of Alaska and Northwest Territories (ISO 639-3 code: ipk) Iisalmen Peli-Karhut, an ice hockey team in Finland