Johnston is a town in Providence County, Rhode Island, United States. The population was 28,769 at the 2010 census. Johnston is the site of the Clemence Irons House (1691), a stone-ender museum, and the only landfill in Rhode Island. Incorporated on March 6, 1759, Johnston was named for the colonial attorney general, Augustus Johnston.
According to the United States Census Bureau, the town has a total area of 24.4 square miles (63 km2). 23.7 square miles (61 km2) of it is land and 0.7 square miles (1.8 km2) (2.91%) is water.
Neighborhoods in Johnston: Thornton (includes part of Cranston), Graniteville, Hughesdale, Morgan Mills, Manton, Simmonsville, Pocasset, West End, Belknap, and Frog City.
The area was first settled by English settlers in the seventeenth century as a farming community. In 1759 the town officially separated from Providence and was incorporated on March 6, 1759. Johnston was named for the current colonial attorney general, Augustus Johnston, who was later burned in effigy during the Stamp Act protests in 1765 and then fled Rhode Island as a Tory during the American Revolution in 1779. The first house of worship in Johnston opened when the Baptist Meeting House in Belknap was constructed in 1771.