Parker's Opera House, also known as Opera House Store, Woolworth's and Parker Place, is a historic building located in Mason City, Iowa, United States.

[2] While it initially filled a need in Mason City, it was replaced by more modern theatres around the turn of the 20th century.

The first floor initially housed a clothing store, and was occupied by F. W. Woolworth Companystarting in the mid-1920s, while the upper floors housed the local offices of the Standard Oil Company at the same time.

[3] Stone was used for both structural and decorative purposes and a metal cornice caps the main facade.

[4] This article about a property in Cerro Gordo County, Iowa on the National Register of Historic Places is a stub.