Highland is a city in Sharp County, Arkansas, United States. The city was incorporated in 1998 and is located in Sharp County. Highland is loca…Highland is a city in Sharp County, Arkansas, United States. The city was incorporated in 1998 and is located in Sharp County. Highland is located at 36°16′11″N 91°31′18″W / 36.26972°N 91.52167°W. According to the United States Census Bureau, the city has a total area of 8.9 square miles, of which 8.8 square miles is land and 0.077 square miles, or 0.66%, is water.