The John H. Barker Mansion is a historic home located in Michigan City, LaPorte County, Indiana.

In 1836, at the age of 22, John Barker Sr. (1814-1878) arrived in Indiana from Andover, Massachusetts, looking for new business opportunities.

He began as a general merchant, expanded into grain brokerage, before opening a commission house to receive and forward merchandise from ships on the lakes.

Upon Barker Jr.'s death in 1910,[6] the Car Company was prospering such that he was worth an estimated fifty to sixty million dollars.

This article about a property in LaPorte County, Indiana on the National Register of Historic Places is a stub.