Marvin is a city located in South Dakota. With a 2020 population of 30, it is the 295th largest city in South Dakota and the 19304th largest city in the United States. Marvin is currently declining at a rate of 0.00% annually and its population has decreased by -11.76% since the most recent census, which recorded a population of 34 in 2010. Marvin reached it's highest population of 31 in 2014. Spanning over 1 miles, Marvin has a population density of 55 people per square mile.
The average household income in Marvin is $47,135 with a poverty rate of 0.00%. The median rental costs in recent years comes to - per month, and the median house value is $57,700. The median age in Marvin is 57.4 years, 58.2 years for males, and 57.4 years for females. For every 100 females there are 100.0 males.