Maybe I’m just lucky but I’ve lived in Ontario (in cities and the country) and have never seen a rat here. I know they exist but it’s not like we’re inundated by them. Maybe some specific businesses have problems with them, but it’s not something you see every day.

I also lived in Montreal and did see them there sometimes. This was always early morning when I was out running - did not see them in Toronto, Ottawa, etc under similar conditions.

Edit based on reading some other comments: I have seen lots of coyotes and foxes so maybe that explains fewer rats. I know Montreal has coyotes but I’ve never seen them there and where I was there were also squirrels everywhere suggesting fewer predators.