St. Leon is a city located in Indiana. With a 2020 population of 675, it is the 368th largest city in Indiana and the 12044th largest city in the United States. St. Leon is currently growing at a rate of 0.30% annually but its population has decreased by -0.44% since the most recent census, which recorded a population of 678 in 2010. St. Leon reached it's highest population of 677 in 2010. Spanning over 7 miles, St. Leon has a population density of 99 people per square mile.
The average household income in St. Leon is $84,036 with a poverty rate of 8.35%. The median rental costs in recent years comes to $790 per month, and the median house value is $205,900. The median age in St. Leon is 39 years, 39.9 years for males, and 34.6 years for females. For every 100 females there are 86.5 males.