Johnson City is the County Seat of Blanco County.  It was named for the pioneer Johnson Family, ancestors of President Lyndon B. Johnson.    Blanco County is a farm and ranch area.  Lyndon B. Johnson National Historical Park Information Center is two blocks south of U. S. 90.   The old Johnson Ranch was called the Johnson Settlement, owned by President Johnson's grandfather and great-uncle from 1867 to 1872.  It was the gathering point of a seven county area for cattle drives.  It also served as an aid station for those wounded in the Deer Creek Indian Battle.  It originally was a dog run cabin, barn and other buildings. The Pedernales Falls State Park which has 4,800 scenic acres is also located in Blanco County.