There are many active locals within the Michigan Green Party. Here are some links:
Capitol Area Greens
http://www.capitolareagreens.org/
Detroit Greens
Kent County Greens
https://www.facebook.com/groups/GreenPartyofWestMichigan/
Middle of the Mitten Greens
https://www.facebook.com/groups/436048883682633/
Muskegon Greens
https://www.facebook.com/MuskegonGreenParty2021
https://twitter.com/muskegongreen21?lang=en
Oakland County Greens
https://www.facebook.com/OaklandCountyGreens/
South Central Greens
https://www.facebook.com/SCMiGreens/
South West Greens
https://www.facebook.com/GPMID6
Travers Bay Watershed Greens
Vehicle City
Washtenaw County
Wayne County