Fosi (disambiguation)

Fosi is a Germanic tribe.

Fosi or FOSI may also refer to:

People

 * Polataivao Fosi Schmidt (1933–2005), boxer and Minister of Labor for Samoa
 * Fosi Pala'amo (born 1976), New Zealand professional rugby player of Samoan descent

Other uses

 * FOSI, Forum Sedimentologiwan Indonesia, Indonesian sedimentologists' forum
 * Formatting Output Specification Instance, a stylesheet language for SGML and XML
 * Family Online Safety Institute, an international nonprofit organization
 * Friends of Stradbroke Island an environmental lobby group on North Stradbroke Island in Queensland, Australia