Mound City is a city located in South Dakota. With a 2020 population of 64, it is the 264th largest city in South Dakota and the 18897th largest city in the United States. Mound City is currently declining at a rate of -1.54% annually and its population has decreased by -9.86% since the most recent census, which recorded a population of 71 in 2010. Mound City reached it's highest population of 71 in 2010. Spanning over 0 miles, Mound City has a population density of 504 people per square mile.
The average household income in Mound City is $48,065 with a poverty rate of 12.50%. The median rental costs in recent years comes to - per month, and the median house value is $55,000. The median age in Mound City is 72.5 years, 73.2 years for males, and 67 years for females. For every 100 females there are 133.3 males.