The Seabird Island First Nation, or Seabird Island Band, is a band government of the Sto:lo people located on Sea Bird Island in the Upper Fraser Valley region, 3 km east of Agassiz, British Columbia, Canada. They are a member government of the Stó:lō Tribal Council. The Seabird Island Band is a multi-faceted First Nations Band that includes government, business, service and non-profit services.