It is an area of rolling farmland, including the Irish Hills.

It is usually defined as anywhere less than approximately 45-50 miles North of the Ohio/Indiana border, it can also be defined as the bottom two rows of counties of Michigan, meaning any county which borders Ohio or Indiana and the county just north of that.

The region shares a state border with Indiana and Ohio.

Depending on the viewer's perspective, the area known as Southern Michigan can fall into three well defined and larger regions of the state:

This Michigan state location article is a stub.