Welcome to WikiTree!
Are you saying you have an ancestor who helped found Hartford, CT, and you want to know if there's a category for town founders?
I would definitely add them to the category for Hartford, i.e. put [[Category:Hartford, Connecticut]] in their biography.
I don't think there is a category for founders of towns yet. I suppose there could be. Would that be a profession? :-) http://www.wikitree.com/wiki/Category:Professions
I'd like to see what others working in the Categorization Project think.