The John C. Williams House (also known as the Manhattan Hotel or Williams Mansion) is a historic home in St. Petersburg, Florida.

[2] On April 24, 1975, it was added to the U.S. National Register of Historic Places.

This house was built in 1891 and is Queen Ann architecture.

Today it serves as the University of South Florida St. Petersburg Developmental Offices.

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