This guy was here when I moved in 20 years ago.
ID old Peony please
It looks like mine. Im looking for an ID as well.
That's a really cheery bloom.
There are a number of popular pink single peonies, including Westerner or Seashell. Early vs late in the season, closeup of the leaf, shape of the bush and such would help someone with more expertise than I have to make an ID. Then there may be some regional preferences to guide you also. What the Canadian peony catalogs say might be of use to you as well.
Maybe you could contact this place http://www.paeonia.com/ If you get an ID, do let us know. :)