In recent decades, critics have accused the ruling People's Action Party (PAP) of unfair electoral practices to maintain significant majorities in the Parliament of Singapore. Among the complaints are that the government uses gerrymandering.

The Elections Department was established as part of the executive branch under the Prime Minister of Singapore, rather than as an independent body. Critics have accused it of giving the ruling party the power to decide polling districts and polling sites through electoral engineering, based on poll results in previous election. Opposition parties have alleged that the Elections Department decisions have given unfair advantage to the ruling party and have affected the outcome of some electoral battles.

Critics point out the dissolution of the Group Representation Constituencies (GRC) of Cheng San GRC and Eunos GRC. Each was dissolved by the Elections Department with voters redistributed to other constituencies after opposition parties gained ground in elections. Such action was controversial. Critics have speculated about the possibility of the Elections Department's dissolving next the Aljunied GRC in the next General Elections, likely in 2010 or 2011. The opposition Workers' Party gained ground there in the General Elections in 2006, when it earned approximately 44% of the votes.

PAP strongholds, such as Tanjong Pagar GRC and Ang Mo Kio GRC, where Minister Mentor Lee Kuan Yew and Prime Minister Lee Hsien Loong respectively contest, have seldom been contested by the opposition. When Ang Mo Kio GRC was last contested in 2006, the PAP has won 66% of the votes.

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