INA as an acronym may refer to:
- Indonesia by IOC country code
- Indian National Army was an Indian nationalist force during World War II aimed at overthrowing British rule over India
- Indian Naval Academy
- INA, a division of the Schaeffler Group
- Immigration and Nationality Act (disambiguation), US law concerning immigration
- Institut national de l'audiovisuel, a repository of all French radio and television audiovisual archives
- National Institute of Arts, Kinshasa (Institut National des Arts), a higher educational institute for performance arts
- Iraqi National Alliance, an Iraqi alliance of Shi'a political parties
- Iraqi National Accord, an Iraqi political party
- Insurance Company of North America, a Philadelphia-based insurance company now part of ACE Limited
- Institute of Nautical Archaeology
- INA - Industrija nafte, Croatia's national oil company
- ina is the ISO 639-2 and ISO 639-3 code for the Interlingua constructed language
Ina may refer to:
- Ina (goddess), a lunar deity in Polynesian mythology
- Ine of Wessex, king of Wessex from 688 to 726
- Princess Ina (Inahime) of Japan
- Ina people, a tribe located in the Centre Province, Cameroon
- Ina (crater), a depression on the Moon
- Ina (film), a 1982 Indian teen romance film
In places:
- Ina, Ibaraki, Japan
- Ina, Nagano, Japan
- Ina, Saitama, Japan
- Ina (river), Poland
- Iňa, Slovakia
- Ina, Illinois, United States
- INA Colony, New Delhi, India