Slim (Arabic: سليم, romanized: Slīm), is an Arabic name which can be either a given name or a surname. It is a variant of Salim or Selim. It is also an English-language surname.

Notable people with the given name or surname include:

• Slim Amamou (born 1977), Tunisian government minister
• Slim Belkhodja (born 1962), Tunisian chess Grandmaster
• Slim Dziri (1875–1953), Tunisian government minister
• Slim Mahfoudh (c. 1942–2017), Tunisian actor
• Maricopa Slim (1883–1914), American gunslinger
• Mongi Slim (1908–1969), Tunisian diplomat and the first African President of the United Nations General Assembly
• Carlos Slim Helú (born 1940), Mexican businessman and one of the richest people in the world
• Carlos Slim Domit (born 1967), Mexican businessman and son of the above
• John Slim (wrestler) (1885–1966), British wrestler who competed at the 1908 Olympics
• William Slim, 1st Viscount Slim (1891–1970), British field marshal and thirteenth Governor-General of Australia

• Slim (nickname)
• Salim, an alternative spelling of the same Arabic name