Sian or Siyan may refer to:
People
- Siรขn, a Welsh girl's name; list of people with this name
Places
- Sian, Iran (disambiguation), various places in Iran, Iraq and Balochistan
- Sian, Russia, a rural locality in Amur Oblast, Russia
- Xi'an, China, formerly romanized as Sian
- Sen (river), Yakutia, Russian Federation
Other uses
- Sian (band), Scottish traditional music band
- Sian (crater), a crater on Mars
- Sian language, a Kajang language of Brunei and Sarawak
- SIANspheric, Canadian band formerly named Sian
- Stop the Islamisation of Norway (Stopp islamiseringen av Norge, SIAN), a Norwegian anti-Islam group which was established in 2008
- Siyan, a Kurdish tribe
See also
- All pages with titles containing Sian
- Sain (disambiguation)
- Sihan language, a Papuan language of Papua New Guinea
- Syan language, a Bantu language spoken in East Africa
- Syan (disambiguation)
- Sayan (disambiguation)
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