- ZIR stands for Zeitschrift Interne Revision
- ZIR stands for Zachodniopomorska Izba Rolnicza (Polish: West Pomeranian Chamber of Agriculture; Poland)
- ZIR stands for Zacks Investment Research, Inc. (Chicago, IL)
- ZIR stands for Zone d’Activité d’Intérêt Régional (French: Regional Interest Activity Area)
ZIR