John Deasy

John Deasy may refer to:

• John Deasy (Superintendent), Former Superintendent of Los Angeles Unified School District
• John Deasy (Fine Gael politician) (born 1967), Irish Fine Gael politician, Teachta Dála (TD) for Waterford from 2002
• John Deasy (UK MP) (1856–1896), Irish nationalist politician, Member of Parliament (MP) 1884–1893