Susquehanna County was created on February 21 , 1810 from part of Luzerne County and named for the Susquehanna River . Its county seat is Montrose 6 . Contents 1 Geography 1.1 Adjacent Counties 2 Demographics 3 Politics 4 Municipalities 4.1 Boroughs 4.2 Townships 5 Education 5.1 Public Libraries 5.2 Public