Gamani Nanda Jayasuriya (30 April 1924 – 26 April 1998) was a Sri Lankan politician.

He was the former Cabinet Minister of Health, Agriculture Development, Food and Co-operatives, a Member of Parliament and former General Secretary of the United National Party.

Jayasuriya was educated at Royal College Colombo.

He was also the Chairman of H. Don Carolis & Sons.

His cousin son Dayan Witharana is a popular singer and photographer.