Wyandanch (disambiguation) From Wikipedia the free encyclopedia Wyandanch is a hamlet and census-designated place (CDP) in the Town of Babylon in Suffolk County, New York. Wyandanch may also refer to: Wyandanch (LIRR station) Wyandanch (sachem) See also[edit] Wyandance (disambiguation) Topics referred to by the same term This disambiguation page lists articles associated with the title Wyandanch.If an internal link led you here, you may wish to change the link to point directly to the intended article.