High Quality Content by WIKIPEDIA articles! Ypsilanti Charter Township is a charter township of Washtenaw County in the U.S. state of Michigan. As of the 2000 census, the township population was 49,182. The City of Ypsilanti is bounded by the township on the west, south, and east; but, like all cities (but not villages) in relation to townships, the city is a separate and distinct jurisdiction.