Upper midwestern states, such as illinois, minnesota, wisconsin, and michigan have proven reliably democratic, while even iowa has shifted toward the democrats. Map of midwest states - check list of usa midwest states, there are 12 midwest states in the united states by 2020 est ppopulation, area and largest city. The upper midwestern states of illinois, michigan, and wisconsin reliably voted democratic in every presidential election from 1992 to 2012.