Kanadaseaga (aka Kanadesaga or Kanatasaka or Kanadasaga or Canasadego or Seneca Castle or Canadasaga), was a major village, perhaps a capital, of the Seneca nation of the Iroquois Confederacy in west-central New York State, United States. It was located between the northern ends of Seneca and Canandaigua lakes, one and a half miles northwest of the present-day city of Geneva in the township of Seneca. The village was situated on both sides of Kanadaseaga Creek.