What's the plural form of Edmontonian? Here's the word you're looking for.
Answer
The noun Edmontonian can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be Edmontonian.
However, in more specific contexts, the plural form can also be Edmontonians e.g. in reference to various types of Edmontonians
or a collection of Edmontonians.