Erie
Lake Erie is on the northern border of Ohio.
Lake Erie and Lake Ontario.
Ohio is the state south of Lake Erie.
In both Canada and USA
Canada
Lake Erie is in North America, it is one of the Great Lakes and forms part of the border between the US and Canada.
Lake Erie is South of Lake Huron
The Niagara River flows northerly from Lake Erie to Lake Ontario. It is 35 miles long and the border between the USA (New York State) and Canada (Ontario Province).
From east to west, the states that border Lake Erie are New York, Pennsylvania, Ohio, and Michigan. Ohio has the longest border, with only tips of New York, Pennsylvania, and Michigan bordering the lake. Canada's Ontario province borders Lake Erie on to the north.
Yes, the state has a 51 mile coastline on Lake Erie which includes the city of Erie.
If you head out into Lake Ontario from Erie, you will be in Canada in about 18 miles.