Rungsung Suisa (4 March 1907 – 17 April 1971) was an Indian politician. Suisa was one of the key figures in the movement to unite Naga-populated areas in Manipur with the Naga Hills (Nagaland). He was popularly known as 'Uncle Suisa'.
Rungsung Suisa belonged to the Tangkhul Naga tribe. He was the son of Rungsung Luithui. He hailed from Somdal, Ukhrul district. He studied at the Jorhat Christian High School. He was amongst the first youths of the Manipur hill people to obtain matriculate education.
Suisa was one of five hill leaders named by the President Manipur State Darbar to participate in the Constitution-Making Committee in 1946. However, Suisa and the other hill leaders did not attend the first session of the Committee. On 13 August 1947 he chaired a meeting of hill leaders, at which the assembled demanded that the hill peoples should have the right to secede from Manipur after a five-year period. However, these demands were not heeded by the Committee, and in the new constitution the administration of the hill areas was placed under the control of the Maharaja. In June 1948 he was elected unopposed to the Manipur State Assembly.
In 1949 he visited Burma, and came into contact with the Communist Party of Burma. His experience in Burma radicalized his political approach, taking a more revolutionary stance in local politics upon his return. He became a member of the Manipur Electoral College in 1951.
Suisa was elected to the Lok Sabha (lower house of the parliament of India) in the 1957 general election. He stood as the Indian National Congress candidate in Outer Manipur constituency, obtaining 21,316 votes (26.24% of the votes in the constituency). In parliament, he was represented in various committees. The Manipur Naga Council boycotted the 1962 general election and Suisa was one of the Naga leaders that was detained at Dum Dum for about a year.