IRO
- Andy Iro
- Birao Airport
- Edgar Iro
- Hapilyn Iro
- Inland Revenue Ordinance
- Institution of Railway Operators
- Internal Revolutionary Organization
- International Refugee Organization
- International Search and Rescue Dog Organisation
- Iro (South Sudan)
- Iro Haarla
- Iro Konstantopoulou
- Iro Lake
- Iro Tembeck
- Iroh
- Japanese oiler Irō
- Jewish Industrial Removal Office
- Kayal Iro
- Kevin Iro
- Lac Iro (disambiguation)
- List of Knight's Cross of the Iron Cross recipients (I)
- Mohawk hairstyle
- Obafemi Owode
- Tony Iro