SIX may refer to:
Computing Seattle Internet Exchange Slovak Internet eXchange Slovenian Internet Exchange Swiss Internet Exchange
Finance SIX Financial Information, a financial data vendor company headquartered in Zürich, Switzerland; a subsidiary of SIX Group SIX Group, a key financial market infrastructure company in Switzerland SIX Interbank Clearing, operator of Swiss Interbank Clearing; a subsidiary of SIX Group SIX Swiss Exchange, Switzerland's principal stock exchange; a subsidiary of SIX Group
Television SIX (Sports Channel) Six (TV series), an American television drama series Six TV, the sixth free to air terrestrial television channel in the UK
Other Six (musical), stylized as SIX
See also 6 (disambiguation)