Dryden is a small unincorporated community in Chelan County, Washington, United States. It is situated along the Wenatchee River in the fertile Wenatchee Valley between the towns of Cashmere and Leavenworth. The community serves as a supply and shipping point for local farms and orchards.Dryden is part of the Wenatchee–East Wenatchee Metropolitan Statistical Area.The USPS ZIP Code for Dryden is 98821. According to data from the 2000 census, the total population in the Dryden ZIP code was 243 persons occupying 101 housing units. Dryden itself is not incorporated, and is not tracked by the Census.