Census & Demographic Data (State of Michigan)
Pre-tabulated profiles of Michigan compiled by the State.
Population and Economic Data for Michigan (Northwest Michigan Council of Governments)
Contains pdf and excel tables for Michigan, including time series for population.
Census Demographic Profiles: 1990-2000 for Michigan and its subdivisions
These files contain reports showing the 2000 Census demographic profile data as released by the Census Bureau along with comparable (where possible) 1990 Census data, and calculate each data item's 1990 Census to 2000 Census percent change.