Alas, no, not a flag for Dungeons & Dragons: rather, a flag for the twin Scottish villages of Denny (pop. 8000) and Dunipace (pop. 2500). The River Carron — which might be the “River Itys” described in Ptolemy’s Geography in the 2nd century — separates the two.
Deadline for submissions is February 17, 2016. For instructions and details, download the Competition Pack PDF, visit the competition’s Facebook page, and check out these concise posters:
Portland Flag Association 
Not sure about that place, but Here is a nice selection for Fiji: https://m.youtube.com/watch?v=MnZD1tEXBqs