Johnston is a city located in South Carolina. With a 2020 population of 2,388, it is the 109th largest city in South Carolina and the 6975th largest city in the United States. Johnston is currently growing at a rate of 0.72% annually and its population has increased by 1.10% since the most recent census, which recorded a population of 2,362 in 2010. Spanning over 3 miles, Johnston has a population density of 902 people per square mile.
The average household income in Johnston is $54,481 with a poverty rate of 22.63%. The median rental costs in recent years comes to $611 per month, and the median house value is $109,900. The median age in Johnston is 38.3 years, 39.4 years for males, and 36.8 years for females. For every 100 females there are 103.4 males.