Well a lot of those states are urban. The lack of a major metropolis doesn't make a state rural. If there are a large number of medium-sized cities and big towns that form the bulk of state's population, plus lots of suburbs, a state is urban imo. I'd only consider a state rural if a large part or a majority of the state's population literally live in villages and small towns, ala West Virginia or Maine. As you may know, there simply aren't a lot of places like that in America anymore. We are a very urbanized country.
Red is a mostly urban state, green mostly rural