The Old Polk County Courthouse (also known as the Imperial Polk County Courthouse) (constructed in 1908–09) is an historic courthouse in Bartow, Florida, United States, located at 100 East Main Street.

It was ostensibly designed in the Classical Revival style by architect Edward Columbus Hosford.

On August 7, 1989, it was added to the U.S. National Register of Historic Places.

The Polk County Historical Museum is located in the courthouse.

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