Martin O'Dwyer (1886 – 18 November 1974) was an Irish politician.
He was an independent member of Seanad Éireann from 1938 to 1943, 1948 to 1954, and from 1960 to 1961.
He was first elected to the 2nd Seanad in April 1938 by the Agricultural Panel, and was re-elected in August 1938.
He was elected to 9th Seanad at a by-election on 9 February 1960, replacing Patrick Baxter.
This article about a member of Seanad Éireann is a stub.