The city has published a Ybor City District Map which include the boundaries for the historic area:
The city also has Landmark structures, with contact information regarding them: from their website;
Below is just a sampling of the City of Tampa Local Landmarks. At present, the City of Tampa has 47 Local Landmark designations. Designation reports may be viewed in our office at 306 E. Jackson Street, 3N at the Tampa Municipal Office Building. If you have any inquiries regarding the Local Landmarks, please call (813)274-8920.
and the reference link: