IRN
# IRN

IRN may refer to:

* Input-referred noise
* Independent Radio News, a news service to commercial radio stations in the United Kingdom
* Independent Radio News (New Zealand), not affiliated with the United Kingdom company above
* International Rivers Network, a non-profit environmental organization based in California, United States
* Imperial Russian Navy, the navy of the Russian Empire
* Iran
* Indian-ringnecked parakeet (abbreviated IRN), the subspecies Psittacula krameri manillensis of the rose-ringed parakeet
* Islamic Council Norway, Islamsk Råd Norge
* Italian Royal Navy, the navy of the Kingdom of Italy
