The crossword solution for Michigan's __ Arbor is ANN. ANN Arbor is a city in the U.S. state of Michigan and the county seat of Washtenaw County. It is situated on the Huron River in the state's Lower Peninsula, approximately 35 miles (56 km) north of Detroit. ANN Arbor is home to the University of Michigan, one of the United States' leading research universities. The city's population was 118, 086 as of the 2010 census.