IGR may refer to:
*
Iguazu International Airport serving Puerto Iguazú and the nearby falls
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IGR Iwate Ginga Railway in Iwate Prefecture, Japan
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Imperial Japanese Government Railways
The Japanese Government Railways (JGR) was the national railway system directly operated by the Japanese Ministry of Railways ( ja, 鉄道省, Tetsudō-shō, ) until 1949. It was a predecessor of Japanese National Railways and the later Japan Rai ...
(or, domestically, Imperial Government Railways) of early 20th century Japan
*
Indiana Guard Reserve
The Indiana Guard Reserve (INGR), formerly the Liberty Guard and the Indiana Legion, is the state defense force of the state of Indiana. The Indiana Guard Reserve serves under the exclusive authority of the governor of the State of Indiana throug ...
, the state defense force of Indiana
*
International Gay Rugby
International Gay Rugby (IGR), formerly known as the International Gay Rugby Association and Board (IGRAB), is the umbrella organisation for the world's gay and inclusive rugby clubs. Based in London, UK, IGR is recognised by World Rugby as the ...
*
Insect growth regulator
An insect growth regulator (IGR) is a substance (chemical) that inhibits the life cycle of an insect. IGRs are typically used as insecticides to control populations of harmful insect pests such as cockroaches and fleas.
Advantages
Many IGRs are la ...
, a chemical that disrupts the growth and/or development of insects
* The
Interessengemeinschaft für Rundfunkschutzrechte (IGR), a broadcasting "IP" rights interest group
**
IGR Stereo, a German standard for analogue TV stereo audio transmission claimed by the above organization.
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Intergenic region
* Integral Gamma-Ray source, a catalog based on observations by the
INTEGRAL telescope
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