City/town names ending with state abbreviations

[J N Winkler]

This is a meta question, but what resources are people using to identify CDPs in particular states?

Wikipedia has lists. For example: http://en.wikipedia.org/wiki/List_of_census-designated_places_in_Oklahoma
Although this does not include the contents of http://en.wikipedia.org/wiki/List_of_cities_in_Oklahoma (where my example came from), or http://en.wikipedia.org/wiki/List_of_towns_in_Oklahoma

Thanks for this.  I did some digging and discovered that Wikipedia doesn't have CDP listing pages for all states--for example, one doesn't exist for Kansas (the closest approximation being a category page).  However, the Census makes cartographic boundary files available for all states and the distribution for each state includes a DBF file which appears to be a complete listing of all CDPs and incorporated communities in that state.

When I downloaded the file for Kansas, I was rather surprised to discover that St. Mark(s) is not even classified as a CDP.