Quebec and New brunswick
Asia
Pennsylvania borders Maryland to the south.
Quebec and New Brunswick ==================== The Chignecto Isthmus, which connects New Brunswick and Nova Scotia, is only 24 miles across.
The Great Lakes border the U.S. states of Minnesota, Wisconsin, Illinois, Indiana, Michigan, Ohio, Pennsylvania, and New York.
When countries share a border it is referred to as a "common or shared" border.
Quebec and New Brunswick ==================== The Chignecto Isthmus, which connects New Brunswick and Nova Scotia, is only 24 miles across.
No provinces share the northern border. Alberta Saskatchewan and part of B.C share the southern border though.
Asia
British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, and Quebec are the Canadian Provinces that shares their southern border with USA.
The province of British Columbia shares a border with only one other province - Alberta. The Province of Newfoundland and Labrador shares a border with only one other province - Québec. All the other provinces share a border with at least two other provinces.
British Columbia and Yukon Territiry
British Columbia, Alberta and Saskatchewan
No US States, however two Canadian Provinces share border and there is a maritime border with Russia.
Pennsylvania borders Maryland to the south.
British Columbia, Alberta and Saskatchewan.
No US State has a border with Alaska but two Canadian Provinces, British Columbia and the Yukon Territory share a common border with the State.
none do. Texas is south of Canada, and no Canadian provinices border Texas.