Ramaraju Vidyasagar Rao (14 November 1939 – 29 April 2017) was an Indian government administrator and a Telangana activist.

He also worked as a consultant to the United Nations Environmental Programme (UNEP) at Nairobi (Kenya) and Addis Ababa (Ethiopia) during November–December, 1991.

[5][6] He contributed more than 100 articles to several Indian news publications, Vaartha, Andhra Jyothi, Eenadu and Namaste Telangana on water-related issues and put out two volumes of Neellu-Nijalu, an anthology of published essays.

He has laid strong basis for the movement by disseminating injustices meted out to Telangana Region in united Andhra Pradesh in irrigation.

He delivered lectures and wrote essays in a simple language, along with the statistics from original and authentic sources and documents, so that common man can also understand.

His writings on water issues and sufferings of Telangana are published in various newspapers in English and Telugu dailies.

Advisor's contributions in establishing a firm base for interstate aspects on water front for Telangana will remain remembered forever.

Without antagonising the Central Government's view of interlinking of rivers, while representing Telangana State at meetings of National Water Development Agency, he advocated for revision of surplus waters available at Ichampalli, keeping the Tribunal Awards and changed technological advancements also in view.

Explaining the relevant Clauses of the AP Reorganisation Act, 2014 and supremacy of the Tribunal Award, Vidyasagar Rao could establish that KRMB did not have the powers to allocate the waters on its own.

Either Bachawat Tribunal Award or agreed quantities by both the States shall only be the basis for distribution of available waters by the Board, whether it is for Krishna Delta, or from NSP and Srisailam Reservoirs.

In June, 2015 to avoid any troubles in the coming year 2015-16, Mr Rao played a major role in arriving at an adhoc arrangement, for sharing of Krishna waters, in a temporary ratio of 299 : 512, Telangana and Andhra Pradesh respectively.

He was also able to clarify the concept of ‘enbloc’ allocations of the Tribunal which paved way for utilisation of Krishna river waters anywhere in the basin as per requirement.

On the basis of Tribunal Awards, Vidyasagar Rao strongly advocated for rightful share to Telangana State in the waters diverted from Godavari to Krishna River.

On his request, age old 'Sri Yogananda Laxmi Narsimha Swamy Temple' Aravapalli (V), Jajireddygudem (M) of Suryapet District is being renovated by the Telangana State Govt.