Wallkill is a hamlet, generally identified as coterminous with ZIP code 12589, telephone exchange 895 in the 845 area code and most of the Wallkill Central School District located mostly in the eastern half of the town of Shawangunk, Ulster County, New York, United States, but partly spilling over into adjacent regions of the Orange County towns of Newburgh and Montgomery. The population was 2,166 at the 2020 census.

Shawangunk is a town in southwestern Ulster County, New York, United States. The population was 13,563 at the 2020 census. The town takes its name from its largest stream, the Shawangunk Kill. The name Shawangunk is from the language of the Lenape people. Kill is an abbreviation of the Dutch word for creek, Killitje. It is pronounced Shuh-Whan-Gung