The 5th Parliament of Singapore was a meeting of the Parliament of Singapore. It commenced its first and only session on 3 February 1981 and was dissolved on 4 December 1984.^[1]

The members of the 5th Parliament were elected in the 1980 general election. Parliament was controlled by a People's Action Party majority, led by Prime Minister Lee Kuan Yew and his Cabinet. The Speaker was Dr Yeoh Ghim Seng.^[2]

Two seats were vacated during the term: on 14 October 1981, Anson's MP Devan Nair vacated his seat to assume his presidency, resulting in the first-ever presence of any opposition-elect with Workers' Party MP J. B. Jeyaretnam winning the ensuing by-election. Exactly two years later on 14 October 1983, Havelock's MP Hon Sui Sen died during the term, but a by-election was not called unlike Anson's case and thus allowing the seat to become vacant until the end of term.

• Speaker: Yeoh Ghim Seng (PAP)
  • Deputy Speaker: Hwang Soo Jin (PAP)
• Prime Minister: Lee Kuan Yew (PAP)
  • Deputy Prime Minister:
    • Goh Keng Swee (PAP)
    • S. Rajaratnam (PAP)
• Leader of the House: Edmund W. Barker (PAP)
• Leader of the Opposition: J. B. Jeyaretnam (WP), from 31 October 1981
• Party Whip of the People's Action Party: Lee Yiok Seng

This is the list of members of the 5th Parliament of Singapore elected in the 1980 general election.