Here is the Census Bureau url with 2012 population estimates for all cities in Michigan and the USA.
http://www.census.gov/popest/data/ci...012/index.html

This September, the Census Bureau will release 2012 American Community Survey data showing the characteristics of Detroit residents. We will be able to see if there has been an migration of young college graduates into the city and, to some degree, analyzing who is leaving. In 2012, Detroit retained its rank as the nation's 18th largest city. Quite likely El Paso will pass Detroit in population size by the time of the next census. Texas cities have annexed their potential suburban rings.