Thorp (/θɔrp/, US dict: thawrp) is an unincorporated community and census-designated place (CDP) in Kittitas County, Washington, United States. The population was 240 at the 2010 census. The surrounding area (ZIP Code Tabulated Area) had a population of 695 as of the 2010 census.The town of Thorp is 99.36 miles east of Seattle, Washington, 9.29 miles northwest of Ellensburg, and 15.21 miles southeast of Cle Elum.