Ernest Charles O'Dea (19 February 1889 – 21 November 1976) was an Australian trade union official, Labor Party politician, Lord Mayor of Sydney and Member of the New South Wales Parliament.

[3] He was an advocate of compulsory unionism and equal pay, and was an opponent of Saturday retail trading and late-night shopping, all major issues in the 1950s and 1960s.

He was a vehement anti-communist and fought against communist influence in trade unions and other industrial organisations.

O'Dea died in 1976 at St George Hospital in Sydney, after suffering a cerebral aneurysm in 1966.

This article about an Australian Labor Party member of the Parliament of New South Wales is a stub.