In 2023, Marvin, SD had a population of 18 people with a median age of 59.5 and a median household income of $38,750. Between 2022 and 2023 the population of Marvin, SD grew from 16 to 18, a 12.5% increase and its median household income declined from $42,500 to $38,750, a −8.82% decrease.
The 5 largest ethnic groups in Marvin, SD are White (Non-Hispanic) (94.4%), Two Races Excluding Other, & Three or More Races (Non-Hispanic) (5.56%), Black or African American (Non-Hispanic) (0%), American Indian & Alaska Native (Non-Hispanic) (0%), and Asian (Non-Hispanic) (0%).
None of the households in Marvin, SD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Marvin, SD are U.S. citizens.