Iao
- Axact
- Eurasian Astronomical Society
- IAO (album)
- Indian Astronomical Observatory
- Information Awareness Office
- Institut d'études politiques de Lyon
- International Academy of Osteopathy
- Interparliamentary Assembly on Orthodoxy
- Istituto agronomico per l'oltremare
- Organist
- Sayak Airport
- The Institute for Art and Olfaction
- Université Lumière-Lyon 2
- Yao (Gnosticism)
- Yao (disambiguation)
- ʻIao Theater
- ʻĪao Valley