The 1990s in the People's Republic of Bulgaria (until November 1990) and the Republic of Bulgaria (from November 1990).

• General Secretary of the Bulgarian Communist Party: Petar Mladenov (1989–1990)
• Chairman of the State Council: Petar Mladenov (1989–1990)
• Chairman of the Republic:
  • Petar Mladenov (1990)
  • Stanko Todorov (1990)
  • Nikolai Todorov (1990)
  • Zhelyu Zhelev (1990)
• Prime Minister of Bulgaria:
  • Georgi Atanasov (1986–1990)
  • Andrey Lukanov (1990)

• President of Bulgaria:
  • Zhelyu Zhelev (1990–1997)
  • Petar Stoyanov (1997–2002)
• Prime Minister of Bulgaria:
  • Andrey Lukanov (1990)
  • Dimitar Iliev Popov (1990–1991)
  • Philip Dimitrov (1991–1992)
  • Lyuben Berov (1992–1994)
  • Reneta Indzhova (1994–1995)
  • Zhan Videnov (1995–1997)
  • Stefan Sofiyanski (1997)
  • Ivan Kostov (1997–2001)

• 10 June – Constitutional Assembly elections were held in Bulgaria.^[1]

• January 22–27 – The 1991 European Figure Skating Championships was a senior-level international competition held in Sofia, Bulgaria.^[2]

• 12 – 19 January – The first direct presidential elections were held in Bulgaria. Incumbent President Zhelyu Zhelev of the Union of Democratic Forces won 52.8% of the vote in the second round.^[3][4]

• The International Commission for the Protection of the Danube River (ICPDR), an organisation established by the Danube River Protection Convention, was signed by the Danube countries in Sofia, Bulgaria.^[5]

• 1 April – The first episode of the Bulgarian television comedy Kanaleto is broadcast on Bulgarian National Television.^[6]

• May 25 – King Simeon returned to Bulgaria.^[7]

• 19 April – Parliamentary elections were held in Bulgaria.^[8]

• 18 – 25 April – The 16th European Badminton Championships were held in Sofia, Bulgaria and were hosted by the European Badminton Union and the Bulgarian Badminton Federation.^[9]

• Protracted demolition attempts on the marble mausoleum of the first communist leader Georgi Dimitrov become national joke.^[10]
• Duet Mania, a Bulgarian pop duet is formed in Sofia.^[11]

• 1991
  • July 6 - Anton Yugov, prime minister (1956-1962)^[12]
• 1993
  • 28 June – Boris Christoff, bass singer (b.1914).^[13]
• 1994
  • November 2 - Grisha Filipov, prime minister (1981-1986)^{[citation needed]}
• 1996
  • October 2 - Andrey Lukanov, prime minister (1990)
  • December 17 - Stanko Todorov, prime minister (1971-1981)
• 1998
  • August 5 - Todor Zhivkov, head of state (1954-1989).^[14]

• History of Bulgaria
• Timeline of Bulgarian history