Siev

Siev or SIEV may refer to:

• Suspected Irregular Entry Vessel, operational term used by the Australian Defence Force and Australian Coastwatch
• Siev., taxonomic author abbreviation of Johann August Carl Sievers (1762–1795), German-born botanist
• W.Siev., taxonomic author abbreviation of Wilhelm Sievers (1860–1921), German geologist and geographer
• David Siev, director of the American documentary film, Bad Axe