In 2022, the population of Quinn was 64, a 3.23% increase year-by-year from 2021. Previously, in 2021, Quinn's population was 62, a decline of 0.00% compared to a population of 62 in 2020.
The median age in Quinn, SD is 56.4, as per 2021 ACS 5-Year Estimates. Of the total population, 22.37% were under the age of 15, 0.00% aged 15 to 29, 55.26% aged 30 to 64, 22.37% aged 65 to 84, and 0.00% were 85 years of age and older.