County Line Branch is a tributary of West Branch Chillisquaque Creek in Northumberland County and Montour County, in Pennsylvania, in the United States. It is approximately 8.9 miles long and flows th

Montour County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 18,136. Its county seat is Danville. The county is named for Andrew Montour, a prominent Métis