Legality of Cannabis by U.S. Jurisdiction Michigan portalUnited States portalHistory portal This category is for topics specifically related to the year 1845 in the U.S. state of Michigan. 18401841184218431844184518461847184818491850 1790s1800s1810s1820s1830s1840s1850s1860s1870s1880s1890s Subcategories This category has the following 2 subcategories, out of 2 total. / 1845 establishments in Michigan (13 P)E 1845 Michigan elections (1 P)