Possible Clues:

• Neighbour of Mich.
• Home of Waterloo: Abbr.
• Man. and Minn. neighbor
• It's on the St. Lawrence River: Abbr.
• Southernmost Can. province
• Toronto prov.
• Niagara Falls's prov.
• London's place: Abbr.
• Sioux Lookout setting: Abbr.
• It's north of Mich.