1991 Singaporean general election

The 1991 Singaporean general election was held on 31 August 1991 to elect all 81 members of the Parliament of Singapore across 36 constituencies. Parliament was dissolved by President Wee Kim Wee on 14 August 1991, upon the advice of Prime Minister Goh Chok Tong. This election was the first to be called under Goh's premiership after succeeding Lee Kuan Yew in 1990. Voting took place in only 25 constituencies, accounting for 40 seats, as the remaining 11 constituencies, comprising 41 seats, were uncontested, with People's Action Party (PAP) candidates returning unopposed.

The election resulted in a decisive landslide victory for the PAP, which secured 77 out of 81 seats, and another supermajority. However, the opposition made historic gains. The Workers' Party (WP), led by J.B. Jeyaretnam, won Hougang Single Member Constituency (SMC), while the Singapore Democratic Party (SDP), under the leadership of Chiam See Tong, retained Potong Pasir SMC and captured Nee Soon Central and Bukit Gombak SMCs. This marked the first time since independence that opposition parties held more than one seat in Parliament, representing the strongest parliamentary presence by the opposition to date at the time. The PAP's popular vote share of 60.97% was also the lowest it had received since independence.

As of 2025, the 1991 election remains the only occasion when no Non-constituency Member of Parliament (NCMP) seats were offered and the sole instance where women representation in Parliament declined. It is also the most recent election in which the WP did not receive the highest contested vote share among opposition parties (41.09%); instead, this distinction went to the SDP (48.56%).