NIR

NIR may stand for:

• Near Infrared, infrared radiation of a wavelength near that of red
• Northern Ireland, a region of the United Kingdom
• Northern Ireland Railways
• National Identity Register
• National Internet registry, an organization under the umbrella of a Regional Internet Registry with the task of coordinating IP address allocations and other Internet resource management functions at a national level within a country or economic unit
• Nir, Ardabil, a city in Ardabil Province, Iran
• Nir, Yazd, a city in Yazd Province, Iran
• Nir County, a county in Ardabil Province, Iran
• Nir District, a district in Yazd Province, Iran
• Nir, a Hebrew word meaning "a plowed field", also a common Hebrew first name and surname
• Natural Increase Rate, a demographic metric of population increase