- Ida of Bernicia, King of a British state.
- Ida (goddess), a goddess of Hinduism.
- Mount Ida
- Mount Ida, Arkansas, a city (and mountain?) in Arkansas.
- Mount Ida, Crete a mountain in Crete
- Mount Ida, Phrygia, a mountain in Phrygia
- Plain of Ida, the plain with Gladsheim and Vingolf in Norse mythology.
- 243 Ida, an asteroid.
- IDA. (International Development Association)
- IDA - Ireland (International Development Authority in Ireland)