In 2023, Mill Spring, MO had a population of 115 people with a median age of 53.2 and a median household income of $22,411. Between 2022 and 2023 the population of Mill Spring, MO grew from 109 to 115, a 5.5% increase and its median household income declined from $29,250 to $22,411, a −23.4% decrease.
The 5 largest ethnic groups in Mill Spring, MO are White (Non-Hispanic) (87.8%), Two Races Excluding Other, & Three or More Races (Non-Hispanic) (10.4%), Two Races Including Other (Non-Hispanic) (1.74%), Black or African American (Non-Hispanic) (0%), and American Indian & Alaska Native (Non-Hispanic) (0%).
None of the households in Mill Spring, MO 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 Mill Spring, MO are U.S. citizens.