57 may refer to:

• 57 (number)
• one of the years 57 BC, AD 57, 1857, 1957, 2057
• "57" (song), a song by Biffy Clyro
• "Fifty Seven", a song by Karma to Burn from the album Arch Stanton, 2014
• "57" (album), a studio album by Klaus Major Heuser Band in 2014
• "57 Live" (album), a live double-album by Klaus Major Heuser Band in 2015
• Heinz 57 (varieties), a former advertising slogan
• Maybach 57, a car
• American Base Hospital No. 57
• Swift Current 57's, baseball team in the Western Canadian Baseball League
• FN Five-Seven, a semi-automatic pistol
• 57 Mnemosyne, a main-belt asteroid