2007 New South Wales state election

A majority being 47 seats, the Labor Party had to lose nine seats (a uniform swing of 8.7%) to lose its majority, and the Liberal-National coalition had to gain 16 seats to gain a majority. Had the Liberal-National coalition gained at least one seat from an Independent, a uniform swing of 11.6% would have been sufficient. Otherwise, the necessary uniform swing required would have been 12.3%. Swings of this size are rare in New South Wales politics.

The swings required for the opposing party to take each of the Assembly's 93 seats are often illustrated by means of a Mackerras pendulum.

The following seats were described as marginal (i.e. those with a two-candidate preferred margin of 6% or less) by psephologists Malcolm Mackerras and Antony Green after the 2005 redistribution.

Balmain, in Sydney's inner-western suburbs, was with Marrickville one of two seats considered potentially winnable for the Greens. Labor incumbent Verity Firth suffered a 2.9% primary and 3.2% two-candidate preferred swing against the Greens, to finish on 39.2% and 53.8% respectively.

The Liberals held on to Hawkesbury despite an independent challenge from Steven Pringle, the disendorsed Liberal incumbent. Pringle won 28.0% of the primary vote, at the expense of Labor and other independent candidates. Liberal candidate Ray Williams saw his primary vote dip by just 1.0%.

In Macquarie Fields, high-profile Liberal candidate Nola Fraser achieved a 12% swing in two-party-preferred terms compared to the 2003 poll. The incumbent, Labor's Steven Chaytor, had bowed out of the contest after being convicted for assaulting his girlfriend. Local issues such as hospital scandals and the 2005 Macquarie Fields riots may have also contributed to the high Liberal vote. Labor candidate Andrew McDonald won Macquarie Fields comfortably.

The Liberals won Manly from the independents for the first time since the 1980s. Sitting MP David Barr lost to future Premier Mike Baird, who increased the Liberals' primary vote by 4.4%.

In the very safe Labor seat of Blacktown Liberal candidate Mark Spencer managed to gain a higher than average swing against incumbent Paul Gibson who then retired at the next election.

Marrickville, in Sydney's inner west, was with Balmain the other seat considered potentially winnable for the Greens. Labor's Carmel Tebbutt suffered a 1.1% primary and 2.6% two-candidate preferred swing against the Greens, to finish on 46.6% and 57.5% respectively. Tebbutt won the seat in a 2005 by-election after quitting the Legislative Council, and is a senior member of the party's left wing and has a strong personal following in the area.

The Liberals lost Pittwater to independent Alex McTaggart at a by-election called after the resignation of John Brogden. The Liberals' Rob Stokes won the seat back on primaries, taking 50.5% of the vote.

Independent Dubbo MP Dawn Fardell fought off a challenge from the Nationals to retain her seat. The Nationals lost ground slightly, but the seat remains one of the state's most marginal.

Star Liberal candidate Pru Goward beat off a tough fight in Goulburn with independent candidate Paul Stephenson capturing a quarter of the vote. Goward was helped by the Nationals' decision not to run in the seat but both Labor and the Coalition lost ground. Allegations surfaced during the campaign that Labor was assisting Stephenson's campaign.

Independent Greg Piper won the safe seat of Lake Macquarie from Labor's Jeff Hunter. Labor and the Liberals lost 10.4% and 15.7% of their primary vote respectively.

Sitting Labor MP Bryce Gaudry chose to stand as an independent after being disendorsed by his party in the seat of Newcastle. Gaudry and another independent, John Tate, both outpolled the Greens and the Liberals. Labor's Jodi McKay suffered a 17.1% swing against her but won the seat on preferences.

Port Stephens Incumbent Labor MP John Bartlett retired at this election. The Liberals' Craig Baumann added 8.7% to his party's primary vote in the seat to outpoll Labor, and narrowly defeat ALP candidate Jim Arneman.

The Labor member for Swansea, Milton Orkopoulos, resigned from parliament after being charged with a number of child-sex and drug offenses. An expected backlash against the ALP materialised in the form of an 11.3% swing, with independent candidate Laurie Coghlan the main beneficiary. Nonetheless, Labor candidate Robert Coombs was able to hold the seat with a comfortable majority.

Tweed, Labor's most marginal seat, fell to the Nationals' Geoff Provest. Labor incumbent Neville Newell had previously served two terms (six years) in the federal seat of Richmond before his two terms (eight years) in the State Parliament. A swing of 7.8% meant that the seat changed from being a marginal seat for Labor to a National Party marginal.

The Liberals lost primary votes in the seat of Wyong, bucking the statewide swing to the party. The Liberals had disendorsed candidate Brenton Pavier after details emerged of a sex joke he had sent to friends via SMS. The Liberals' new candidate, Ben Morton, managed a 5.4% swing in two-party-preferred terms, not enough to take victory from Labor candidate David Harris. Incumbent Labor MP Paul Crittenden retired at the election.

• Dawn Fraser, a champion swimmer, headed her own independent ticket for the Legislative Council, but was unsuccessful in getting elected.
• Pru Goward, a former federal Sex Discrimination Commissioner, won Goulburn for the Liberals
• Mamdouh Habib, a former Guantanamo Bay detention camp inmate, ran as an independent in Auburn
• Phil Koperberg, the state's Rural Fire Service chief, won Blue Mountains for Labor
• Jodi McKay, a former NBN Television newsreader, won Newcastle for Labor
• June Dally Watkins, head of the eponymous deportment school, was a Legislative Council candidate for the Christian Democrats

A number of MPs did not seek re-election in 2007. Liberal MPs Andrew Tink (Epping) and Peta Seaton, (Southern Highlands) retired. Andrew Humpherson (Davidson) lost preselection and did not contest his seat. Nationals MP Ian Slack-Smith (Barwon) also retired.

The Labor MPs retiring at the 2007 election were John Bartlett (Port Stephens), Paul Crittenden (Wyong), John Mills (Wallsend), Sandra Nori (Port Jackson), John Price (Maitland) and Kim Yeadon (Granville). Steven Chaytor (Macquarie Fields) and Milton Orkopoulos (Swansea), each arrested for violent crimes in late 2006, pulled out of the election. Carl Scully (Smithfield), dumped from the ministry for misleading parliament, chose not to recontest his seat. Attorney-General Bob Debus (Blue Mountains) did not seek re-election, in anticipation of a move to federal politics.