Cottage Hills is an unincorporated community in Madison County, Illinois, United States.

Cottage Hills was likely inhabited around the same time as the other parts of Madison County, becoming primarily used for farming.

Cottage Hills during this time was originally known as Possum Ridge, for its location on the edge of the Mississippi Bluffs.

[6][7] In the coming decades, Cottage Hills would slowly decline, with the railway that passed through eventually closing and being torn down.

[8] During the late 20th century, Cottage Hills' economy would slowly die out, with most people going to Bethalto or Alton for their entertainment and food needs.