Preserver can refer to:

• Life preserver, a personal flotation device or lifebuoy
• {{HMCS|Preserver}}, a Canadian navy ship
  • {{HMCS|Preserver|AOR 510}}, Protecteur-class supply ship
  • {{HMCS|Preserver|1941}}, leadship of the Fairmile-support depot ships
• {{USS|Preserver|ARS-8}}, a U.S. navy ship
• Preserver (Elfquest), a race in the fantasy comic Elfquest
• Preservers (Star Trek), a Star Trek species
• Preserver (Star Trek), a novel by William Shatner

• Sydney Shearer
• Sydney Showground Main Arena
• Sydney Siame
• Sydney Sixers (WBBL)
• Sydney Sixers Women
• Sydney Smith (Illustrator)
• Sydney Smith (illustrator)
• Sydney Snow
• Sydney Society of Artists
• Sydney Speedway
• Sydney Spencer
• Sydney Spirit
• Sydney's Pride History Group
• Sydney's south-east
• Sydney's south-west
• Sydney Stack
• Sydney Stakes
• Sydney Stanhope
• Sydney state by-election, 2012
• Sydney Sting
• Sydney stock exchange
• Sydney Stranks
• Sydney Strong
• Sydney Suburban Railways
• Sydney Sunderland