McCaskill is a town in Hempstead County, Arkansas, United States. The population was 96 at the 2010 census. It is part of the Hope Micropoli…McCaskill is a town in Hempstead County, Arkansas, United States. The population was 96 at the 2010 census. It is part of the Hope Micropolitan Statistical Area. According to the United States Census Bureau, the city has a total area of 0.7 square miles, all land.