Donley County is in Rolling Plains North Texas. Of the 254 counties in the state, Donley County ranks 110th in terms of size (597,149 acres). The most common type of land for sale by combined acreage in Donley County is house. Browse all Donley County undeveloped land for sale on the Land Network to find your next commercial property or land investment. The Texas Panhandle gets its name for its proximity to the handle-shaped portion of its neighbor, Oklahoma. It is the state's least populated region.