What are the names of of the five great lakes?
Huron, Ontario, Michigan, Erie, Superior
The question is much too vague. Ontario is a huge province with many hundreds of lakes. What in particular do you mean by "the Five Lakes"? Your question might imply the five Great Lakes, but only four of the five have a border with Ontario, and none of them are "in" Ontario, they all are shared with American states, mostly Michigan.
Not just one state has the five great lakes. In fact, the five great lakes aren't all in just the United States. Both Canada and the USA have some of the five great lakes. The border crosses right in the middle of each of the lakes, so Canada and the USA both have parts of each of the lakes. You can go to this link to see a picture example: http://static.ddmcdn.com/gif/willow/the-great-lakes0.gif