He is the recipient of the 1996 IISc Alumni award for excellence in research. He was conferred the Distinguished Alumni Award in the year 2009 by the Council of the Indian Institute of Science. He was awarded the 2012 Prof S K Mitra Memorial Award by the Indian National Academy of Engineering.
N. Viswanadham is a Fellow of the IEEE, a Fellow of Indian National Science Academy, Indian Academy of Sciences, Indian National Academy of Engineering, and The World Academy of Sciences. He was the Chief Editor of Sadhana, Academy Proceedings in Engineering Sciences from July 2013 to Auguest 2018. He was the Editor in Chief of IEEE Transactions on Automation Science and Engineering during 2008-2012.