← 1990 1989 1988 1991 in São Tomé and Príncipe → 1992 1993 1994
Decades:	1970s 1980s 1990s 2000s 2010s
See also:	Other events of 1991 Timeline of Santomean history

The following lists events that happened during 1991 in the Democratic Republic of São Tomé and Príncipe.

• President: Leonel Mário d'Alva (acting) (until 3 April), Miguel Trovoada (from 3 April)
• Prime Minister: Celestino Rocha da Costa (until 7 February), Daniel Daio (from 7 February)

• 20 January: The first legislative election took place
• 7 February: Daniel Daio becomes Prime Minister of São Tomé and Príncipe^[1]
• 3 March: The first presidential election took place
• 2 April: Miguel Trovoada becomes the second president of São Tomé and Príncipe
• April: the I Constitutional Government of São Tomé and Príncipe began

• Santana FC won the São Tomé and Príncipe Football Championship^[2]