Indianola is a city in Warren County, Iowa, United States, located 14 miles (23 km) south of downtown Des Moines, Iowa. The population was 14,782 at the 2010 census. It is the county seat of Warren County. Indianola is home to the National Balloon Classic, a nine-day hot air balloon festival held annually in the summer, the Des Moines Metro Opera, a world renowned major American Summer Opera Festival, and Simpson College.
Indianola was founded in 1849 as the county seat of Warren County. The town was located near the geographic center of the new county. The town's name was taken from a newspaper account of a Texas town of the same name.
Indianola was incorporated in 1863.
According to the United States Census Bureau, the city has a total area of 11.25 square miles (29.14 km2), all of it land. The Summerset Trail's southern terminus at Indianola.
In 2005, a special census was conducted that revised Indianola's population to 14,156.
As of 2013, there were 15,108 people, 5,477 households, and 3,579 families living in the city. The population density was 1,314.0 inhabitants per square mile (507.3/km2). There were 5,893 housing units at an average density of 523.8 per square mile (202.2/km2).