Johnson County /

Johnson County is a county located in the U.S. state of Indiana. As of 2010, the population was 139,654. The county seat is Franklin. According to the 2000 census, the county has a total area of 321.56 square miles (832.8 km), of which 320.19 square miles (829.3 km) (or 99.57%) is land and 1.36 square miles (3.5 km) (or 0.42%) is water. Johnson County was formed in 1823. It was named for John Johnson, a judge of the Indiana Supreme Court. This is probably John Johnson of Knox County, delegate to the State constitutional convention, appointed to the Supreme Court in 1816. In recent years, average temperatures in Franklin have ranged from a low of 18 °F (−8 °C) in January to a high of 84 °F (29 °C) in July, although a record low of −22 °F (−30 °C) was recorded in January 1985 and a record high of 104 °F (40 °C) was recorded in June 1988. Average monthly precipitation ranged from 2.05 inches (52 mm) in January to 4.78 inches (121 mm) in July. The county government is a constitutional body, and is granted specific powers by the Constitution of Indiana, and by the Indiana Code. County Council: The county council is the legislative branch of the county government and controls all the