> Last month, Amanda Morari spent her sister’s bachelorette weekend at a lakefront cottage in Ontario province.

As a Canadian it felt a little weird seeing "province" tacked on to the end of Ontario (and Quebec, earlier on in the article). Is this an Americanism, and why?

I get that there is Washington State and Washington, DC, but there's only one Texas, one Connecticut, one North Dakota...

No Canadian I know calls it Ontario province or Yukon territory (though I suppose the NWT is the lone exception.)