Ontario (Ontario), yake az kulhoi sistemai Kulhoi Buzurgi Amerikai Shimoli voqe dar, Shtathoi Muttahidai Amerika va Kanada. Qarib 310 kilometr darozi va to 90 kilometr bar dorad. Masohat 19,5 hazor kilometr* Chuquriash to 236 metr. Masohati havzaash qarib 90 hazor kilometr2.
Ob az kulhoi dar bolo choygirifta ba vositai daryoi Niagara ba Ontario merezad, az kul boshad daryoi Xazrati Lavrentiy (rohi kishtigard ba uqyonusi Atlantik) jori meshavad. Ontario ba vositai kanali Uellend bo kuli Eri va ba vositai kanalhoi Osuigo va Eri bo daryoi Gudzon aloqamand ast. Davrai yakhbandiash dekabr — aprel. Dar sohili Ontario shahrhoi Toronto, Gamilton, Kingston (Kanada), Rochester (Shtathoi Muttahidai Amerika) voqeand.