The campaigner against the Corrib gas pipeline in Co Mayo, Willie Corduff, is among six people who have each won a Goldman Environmental Prize.
Each of the six will receive $125,000 (€92,000) in recognition of the environmental work in six different regions around the world.
Mr Corduff, a Co Mayo farmer, was one of the so-called Rossport Five, who staged protests against the gas pipeline.
The five were also jailed for being in contempt of a High Court order in relation to the development.
Mr Corduff will receive his award on Monday.