Ian Cohen (born 5 June 1951) is a former Australian politician and member of the Greens New South Wales.

Cohen's involvement in such campaigns was characterised by radical, front-line protest action; in the Franklin River Dam protest, for example, he opposed The Wilderness Society's decision to halt the up-river blockade in the period between the election of the anti-Dam Federal Labor government and the Australian High Court decision that ultimately saved the river.

[2] Cohen was a founder of the Sydney Peace Squadron and the Brisbane Peace and Environment fleet and came to international attention in 1986 when photographed on a surfboard, while clinging to the bow of the destroyer USS Oldendorf (DD-972), as she pulled into Sydney Harbour to participate in the 75th Anniversary of the Royal Australian Navy.

After contesting a seat in the state upper house in 1991, in March 1995 he was elected to the New South Wales Legislative Council as its first Green member.

He was involved, as a Member of the State Development Committee in Parliament, in enquiries into the Viability of Rural Towns, Sustainable Agriculture, and Fisheries, as well as looking into issues such as salinity.