The present campus of the Institute is a self-contained sylvan complex spread over an area of about 500 hectares (approx. 1250 acres). It is located about 8 km (5 miles) west of New Delhi Railway Station and about 16 km (10 miles) east of Indira Gandhi International Airport at Palam. The location stands at 28.08⁰N and 77.12⁰E, the height above mean sea level being 228.61 metres (750 feet). It is adjacent to hill side road. The climate is sub-temperate and semi-arid. The mean maximum daily temperature during the hot weather (May-October) ranges from 32.2⁰C to 40⁰C and the mean minimum temperature from 12.2⁰C to 27.5⁰C. June to September is rainy months during which about 500 mm of rainfall is received.

Shri Narendra Modi, Hon'ble Prime Minister, unveiled foundation stone of Indian Agriculture Research Institute-Jharkhand at Barhi, District Hazaribagh, Jharkhand on 28 June, 2015. In his captivating address, Shri Modi emphasized research is important in the agriculture sector and this cannot happen only in one place. He said that revolution in agriculture can take place in Eastern UP, Bihar, West Bengal, Jharkhand, Assam...the eastern part of India. He said that amid rising population and increasingly fragmented land-holdings, the need of the hour for the nation is a second green revolution without any delay, which could only happen in eastern India. The Prime Minister said proper research was required in all agro climatic zones of the country. This would ensure best results, as well as greater acceptability among farmers. 

Union Minister of Agriculture Narendra Singh Tomar inaugurated the Indian Agricultural Research Institute's (IARI) Assam campus in Dhemaji district on 26 sept., 2020 and said the setting up of this institute will boost farm education and research activities in the North East. The Union Cabinet in May 2017 had approved setting up of Indian Agricultural Research Institute (IARI) in Assam at a cost of over ₹155 crore to promote agri-education and realise second green revolution in the north eastern region. “As the pre-fabricated building is ready, the classes of students to be admitted from 2020-21 session will be started at IARI, Assam campus. Initially, three divisions will function namely Division of Crop Improvement, Division of Horticulture and Division of Animal Science & Fisheries,” the statement said.