Depends on what you’re measuring. For housing we use square feet, for land we use acres and sometimes square km depending on context, most other things in my experience we just use dimensions instead (eg. 11x13 or something). If you have specific areas in mind I may be able to more precisely answer your question.

Well, in America, we use football fields, so I presume Canada uses hockey rinks.

i don’t see area being discussed very often but when it is, it’s usually in hectares