Quebec, Nova Scotia... And there's Bermuda and the Bahamas, who sympathized with the Americans greatly but remained British in the end.
In fairness, Nova Scotia, so recently repopulated by Yankees, had quite the sympathy for the rebels but most of these Yankees were still setting up a life in the colony. Halifax being British America's main naval base allowed them to prevent anyone from assembling a popular government. Still, certain counties sent representatives asking Congress to just admit the whole colony anyway.
The local Eddy's Rebellion was indeed in frontier *New Brunswick and fizzed out quickly, but that it happened at all and got as far as it did should say something.
Even post ARW New Brunswick was made because the local Nova Scotia citizens were apparently not taking to the Loyalists kindly and apparently bitchier on rights with the war' send than any of the old colonies were!