Morrow is an unincorporated community and census-designated place in Washington County, Arkansas, United States. A post office has been in operation at Morrow since 1883; The community had the name of G. W. Morrow, an early postmaster. it was first listed as a CDP in the 2020 census with a population of 263; Morrow is located in the Northwest Arkansas region 6.5 miles south of Lincoln. Morrow has a post office with ZIP code 72749.