Interior is a city located in South Dakota. With a 2020 population of 103, it is the 235th largest city in South Dakota and the 18289th largest city in the United States. Interior is currently declining at a rate of 0.00% annually and its population has increased by 9.57% since the most recent census, which recorded a population of 94 in 2010. Interior reached it's highest population of 103 in 2016. Spanning over 1 miles, Interior has a population density of 77 people per square mile.
The average household income in Interior is $48,647 with a poverty rate of 6.67%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Interior is 51.6 years, 51.2 years for males, and 59.1 years for females. For every 100 females there are 108.3 males.