They fly a flag. Often the Canadian one (it's Irving FFS we can't control that lol).
RE: municipal and provincial buildings... They all display the Canada, Union, and provincial flag. Minimum. City of St. John's, for example, displays those and the flags of every province and territory.
Cupid NL has, I think officially, the world's largest Union flag.
Cupids Union Jack by
Zach Bonnell, on Flickr