ranked slightly below the national average posted a comparison posted a comparison http://www.act.org/newsroom/data/2012/states.html the ACT site ACT website 2012 scores http://www.act.org/newsroom/data/2012/states.html The average ACT score in Michigan is 20.1, the average ACT scores http://www.act.org/newsroom/data/2012/states.html the average ACT scores act.org the average ACT scores posted a comparison http://www.act.org/newsroom/data/2012/states.html ACT Scores by State highest ACT scores in the country ACT's stats