Description Autumn And The River Beyond, Elderberries Sambucus In Autumns Garden Of Nature, Payette River, Banks, IdahoBanks is an unincorporated census-designated place in Boise County, Idaho, United States. Banks is located on Idaho State Highway 55 12 miles (19 km) north-northeast of Horseshoe Bend. Banks has a post office with ZIP code 83602.[2] As of the 2010 census, its population was 17.[3]The North and South forks of the Payette River meet at Banks, which makes it a popular destination for people rafting or kayaking on the Payette River. The 'Main' run of the Payette River begins at Banks, while the 'Staircase' run on the South Fork ends at Banks.Wikipedia