IPSO may refer to:
Organisations Independent Press Standards Organisation, a press industry regulator in the UK International Programme on the State of the Ocean Les Intellectuels pour la souveraineté, a group of intellectuals studying and promoting Quebec independence IPSO Alliance, promoting the Internet Protocol for what it calls "smart object" communications Irish Payment Services Organisation International Psychosocial Organisation
Other uses Ipso (candy), a small drop-style candy sold in Great Britain in the 1970s–1980s Ipso, an arene substitution pattern in organic chemistry Ipso facto, a Latinate phrase used in law Check Point IPSO, an operating system for Nokia IP Security Platforms IPSO, a brand of Alliance Laundry Systems
See also Ipsos, a global market research firm