Walker Valley is a hamlet located in the western part of the Town of Shawangunk in Ulster County, New York, United States, generally thought of as coterminous with the 12588 ZIP code. The population was 1,269 at the 2020 census. Walker Valley is one of the three geographic sections of the town that local residents use. It is centered on NY 52 in the western part of town, where it begins to slope up to the Shawangunk Ridge.