Jonathan Richard O'Dea (born 9 March 1966) is a former Australian politician and a member of the New South Wales Legislative Assembly representing Davidson for the Liberal Party from 2007 until 2023.

[4] In 2005, O'Dea was the general manager of the Crown Insurance Group and a director with HCF and was named as a potential candidate for the seat of Pittwater, following the resignation of the sitting member and Opposition leader, John Brogden.

In a Liberal Party preselection battle before the 2007 state election, O'Dea defeated the sitting member for Davidson, Andrew Humpherson.

[7] In September 2009, O'Dea was accused in a local newspaper, the Manly Daily, of failing to adequately represent his constituents, by Ku-ring-gai Councillor Tony Hall, who urged O'Dea to "get off his backside" and lobby New South Wales Planning Minister Kristina Keneally to protect the area from excessive development.

[1] At the 2019 state election, O'Dea suffered a small swing against him, but was still re-elected with a majority of 75.2 percent against the Greens, making Davidson the safest Liberal seat in Sydney.

Following the election, Premier Berejiklian nominated Mr O'Dea as the 40th Speaker of the Legislative Assembly, succeeding Shelley Hancock.

In line with established parliamentary tradition, Mr O'Dea was ceremonially ‘dragged’ to the Speaker's chair by Premier Berejiklian and Planning Minister, Rob Stokes.