The American Religious Identification Survey, administered periodically by The Program on Public Values at Trinity College in Connecticut, has been released for 2008 and it shows a relatively dramatic decrease in religious belief since the last major study in 1990. Michigan is no exception.
The total number of people self-identifying as Christian in Michigan dropped from 86% in 1990 to 75% in 2008, with the largest decline coming among Catholics, which went from 29% of the state’s population to 20%. The number of adherents to other religions stayed steady at 3%, but the number of people identifying as non-religious jumped from 9% to 16%.
This mirrors the trend nationwide, where the percentage of people identifying themselves as Christians has dropped from 86% of the national population in 1990 to 76% today. The number of non-religious Americans has jumped significantly, from 8.2% to 15%.