This response is years late and I should be embarrassed for even responding to such an insipid query But so that you know Mockinbird Heights was most likely situated as a small bedroom Suburb of New York State situated below New York City and embedded in probably Westchester Putnam or Organge county  There are a couple of allusions as to the geographical placment for example in one episode the Munster were required to remove temporarily to the city Buffalo New York  The characters made many disparaging remarks about the declining state of the nowrustbelt and depressed area which has been dying since the late fifties  This would also make sense as most of the Hollywood writers creators and producers came from New York City of that eraever since the begining of the movie industry and has prolifically and affectionately represented their area origin that gave them so much oppertunities    Veryverser