Syd

Syd or SYD may refer to:


 * Syd (name), including a list of people with the name
 * Syd., taxonomic author abbreviation of Hans Sydow (1879–1946), German mycologist
 * Sydney, New South Wales, Australia
 * IATA code for Sydney Airport, New South Wales, Australia
 * Syd the platypus, a mascot of the Sydney 2000 Olympic games.
 * Sydney FC, professional soccer club
 * Syd (singer), an American singer-songwriter
 * National Rail station code for Sydenham railway station (London), London, England
 * Stonewall Young Democrats, a young gay democratic club based out of Los Angeles, California
 * Hans Sydow (1879-1946), a German mycologist with author abbreviation "Syd."
 * Sum-of-Years' Digits, an accounting, economics, and financial depreciation method
 * Saw You Drown
 * Seitokai Yakuindomo, a Japanese manga and anime series by Tozen Ujiie.