Lake Ontario yana ɗaya daga cikin manyan tafkuna biyar na Arewacin Amurka. Yankin Ontario na Kanada yana kewaye da shi a arewa, yamma, da kudu maso yamma, kuma a kudu da gabas ta jihar Amurka ta New York, wanda iyakokin ruwa suka hadu a tsakiyar tafkin. Ontario, lardin da ya fi yawan jama'a a Kanada, an sa masa suna ne don tafkin. Yawancin biranen da ke da yawan jama'a a Ontario, ciki har da Toronto, birni mafi yawan jama'a a Kanada, da Hamilton, suna kan gabar arewa ko yammacin tafkin. A cikin harshen Huron, sunan Ontarí' yana nufin "Lake of Shining Waters".
Birnin New York