Washington is a city in Ozan Township, Hempstead County, Arkansas, United States. The population was 180 at the 2010 census, up from 148 in 2000. It is part of the Hope Micropolitan Statistical Area. The city is home to Historic Washington State Park.

Hempstead County is a county located in the U.S. state of Arkansas. As of the 2020 census, the population was 20,065, down from 22,609 at the 2010 census. The county seat is Hope. Hempstead County is Arkansas's fourth county, formed on December 15, 1818, alongside Clark and Pulaski counties. The county is named for Edward Hempstead, a delegate to the U.S. Congress from the Missouri Territory, which included present-day Arkansas at the time. It is an alcohol prohibition or dry county.