Diwan Bahadur Sir Narasimha Gopalaswami Ayyangar CSI CIE (31 March 1882 – 10 February 1953) was an Indian civil servant and statesman, who served as the Prime Minister of the princely state of Jammu and Kashmir and later a minister in the first cabinet of independent India.

He was a member of the drafting committee of the Constitution of India, the leader of the Rajya Sabha, a 'minister without portfolio' looking after Kashmir Affairs, and the Minister for Railways.

[1] Ayyangar's political career gained prominence during his tenure as Prime Minister of Jammu and Kashmir (1937–43).

The move caused frictions with the home minister Vallabhbhai Patel, who should have normally been responsible for Kashmir along with all other princely states.

[7] In 1952, Prime Minister Nehru appointed him as India's representative in the ongoing negotiations and discussions about Kashmir at the Geneva talks.

He was the main architect in the regrouping of the Indian Railways into six zonal systems - Central, Eastern, Northern, North-eastern, Southern, and Western.

[10] Ayyangar died in Madras at the age of 71 on 10 February 1953, and was survived by his wife, a son, G. Parthasarathy, who was then Assistant Editor of The Hindu, and a daughter.