Ypsilanti, commonly shortened to Ypsi, is a city in Washtenaw County in the U.S. state of Michigan, perhaps best known as the home of Eastern Michigan University. As of the 2017 census, the city's population was 21,018. The city is bounded to the north by Superior Township and on the west, south, and east by Ypsilanti Township. Ypsilanti is located 6 miles east of Ann Arbor and about 18 miles west of the Detroit city limits.The geographic grid center of Ypsilanti is the intersection of the Huron River and Michigan Avenue, the latter of which connects downtown Detroit, Michigan with Chicago, Illinois, and through Ypsilanti is partially concurrent with U.S. Route 12 Business and M-17.