A very brief history of Tioga County is on Wikipedia. There is a great history on the towns within Tioga county on Tioga County Historical Society's website.
A list of cemeteries in Tioga County can be found at Tioga County NYGenWeb. You can also search through the listing on Find A Grave.
Below is a list of cemeteries I have visited within Tioga County. They are separated by the town or village the cemetery is located in. Here is a link to the posts I've made on Tioga County cemeteries.
- Lockwood Cemetery (half in Chemung County, half in Tioga County)