South St. Paul is a city located in Minnesota. With a 2020 population of 20,165, it is the 57th largest city in Minnesota and the 1833rd largest city in the United States. South St. Paul is currently growing at a rate of 0.05% annually and its population has increased by 0.02% since the most recent census, which recorded a population of 20,160 in 2010. South St. Paul reached it's highest population of 25,016 in 1970. Spanning over 6 miles, South St. Paul has a population density of 3,586 people per square mile.
The average household income in South St. Paul is $69,217 with a poverty rate of 10.84%. The median rental costs in recent years comes to $938 per month, and the median house value is $177,700. The median age in South St. Paul is 34.7 years, 33.9 years for males, and 35.6 years for females. For every 100 females there are 95.6 males.